diff --git a/app/components/Menu.tsx b/app/components/Menu.tsx
index 3df17dc..4dc13f7 100644
--- a/app/components/Menu.tsx
+++ b/app/components/Menu.tsx
@@ -16,6 +16,7 @@ import cn from '~/utils/cn';
 
 interface MenuProps extends MenuTriggerProps {
 	placement?: Placement;
+	isDisabled?: boolean;
 	children: [
 		React.ReactElement<ButtonProps> | React.ReactElement<IconButtonProps>,
 		React.ReactElement<MenuPanelProps>,
@@ -23,8 +24,9 @@ interface MenuProps extends MenuTriggerProps {
 }
 
 // TODO: onAction is called twice for some reason?
+// TODO: isDisabled per-prop
 function Menu(props: MenuProps) {
-	const { placement = 'bottom' } = props;
+	const { placement = 'bottom', isDisabled } = props;
 	const state = useMenuTriggerState(props);
 	const ref = useRef<HTMLButtonElement | null>(null);
 	const { menuTriggerProps, menuProps } = useMenuTrigger<object>(
@@ -40,6 +42,7 @@ function Menu(props: MenuProps) {
 		<div>
 			{cloneElement(button, {
 				...menuTriggerProps,
+				isDisabled: isDisabled,
 				ref,
 			})}
 			{state.isOpen && (
diff --git a/app/routes/machines/components/machine.tsx b/app/routes/machines/components/machine-row.tsx
similarity index 98%
rename from app/routes/machines/components/machine.tsx
rename to app/routes/machines/components/machine-row.tsx
index 9724201..5f900e9 100644
--- a/app/routes/machines/components/machine.tsx
+++ b/app/routes/machines/components/machine-row.tsx
@@ -18,6 +18,7 @@ interface Props {
 	isAgent?: boolean;
 	magic?: string;
 	stats?: HostInfo;
+	isDisabled?: boolean;
 }
 
 export default function MachineRow({
@@ -27,6 +28,7 @@ export default function MachineRow({
 	isAgent,
 	magic,
 	stats,
+	isDisabled,
 }: Props) {
 	const expired =
 		machine.expiry === '0001-01-01 00:00:00' ||
@@ -191,6 +193,7 @@ export default function MachineRow({
 					routes={routes}
 					users={users}
 					magic={magic}
+					isDisabled={isDisabled}
 				/>
 			</td>
 		</tr>
diff --git a/app/routes/machines/components/menu.tsx b/app/routes/machines/components/menu.tsx
index cccabdb..01a7e71 100644
--- a/app/routes/machines/components/menu.tsx
+++ b/app/routes/machines/components/menu.tsx
@@ -16,6 +16,7 @@ interface MenuProps {
 	users: User[];
 	magic?: string;
 	isFullButton?: boolean;
+	isDisabled?: boolean;
 }
 
 type Modal = 'rename' | 'expire' | 'remove' | 'routes' | 'move' | 'tags' | null;
@@ -26,6 +27,7 @@ export default function MachineMenu({
 	magic,
 	users,
 	isFullButton,
+	isDisabled,
 }: MenuProps) {
 	const [modal, setModal] = useState<Modal>(null);
 
@@ -96,7 +98,7 @@ export default function MachineMenu({
 				/>
 			)}
 
-			<Menu>
+			<Menu isDisabled={isDisabled}>
 				{isFullButton ? (
 					<Menu.Button className="flex items-center gap-x-2">
 						<Cog className="h-5" />
diff --git a/app/routes/machines/dialogs/new.tsx b/app/routes/machines/dialogs/new.tsx
index b574579..f245243 100644
--- a/app/routes/machines/dialogs/new.tsx
+++ b/app/routes/machines/dialogs/new.tsx
@@ -8,12 +8,13 @@ import Menu from '~/components/Menu';
 import Select from '~/components/Select';
 import type { User } from '~/types';
 
-export interface NewProps {
+export interface NewMachineProps {
 	server: string;
 	users: User[];
+	isDisabled?: boolean;
 }
 
-export default function New(data: NewProps) {
+export default function NewMachine(data: NewMachineProps) {
 	const [pushDialog, setPushDialog] = useState(false);
 	const [mkey, setMkey] = useState('');
 	const navigate = useNavigate();
@@ -25,11 +26,8 @@ export default function New(data: NewProps) {
 					<Dialog.Title>Register Machine Key</Dialog.Title>
 					<Dialog.Text className="mb-4">
 						The machine key is given when you run{' '}
-						<Code isCopyable>
-							tailscale up --login-server=
-							{data.server}
-						</Code>{' '}
-						on your device.
+						<Code isCopyable>tailscale up --login-server={data.server}</Code> on
+						your device.
 					</Dialog.Text>
 					<input type="hidden" name="_method" value="register" />
 					<input type="hidden" name="id" value="_" />
@@ -53,7 +51,7 @@ export default function New(data: NewProps) {
 					</Select>
 				</Dialog.Panel>
 			</Dialog>
-			<Menu>
+			<Menu isDisabled={data.isDisabled}>
 				<Menu.Button variant="heavy">Add Device</Menu.Button>
 				<Menu.Panel
 					onAction={(key) => {
diff --git a/app/routes/machines/action.tsx b/app/routes/machines/machine-actions.ts
similarity index 59%
rename from app/routes/machines/action.tsx
rename to app/routes/machines/machine-actions.ts
index 1c38def..728bde8 100644
--- a/app/routes/machines/action.tsx
+++ b/app/routes/machines/machine-actions.ts
@@ -1,43 +1,65 @@
 import type { ActionFunctionArgs } from 'react-router';
 import type { LoadContext } from '~/server';
+import { Capabilities } from '~/server/web/roles';
+import { Machine } from '~/types';
 import log from '~/utils/log';
-import { send } from '~/utils/res';
+import { data400, data403, data404, send } from '~/utils/res';
 
-// TODO: Turn this into the same thing as dns-actions like machine-actions!!!
-export async function menuAction({
+// TODO: Clean this up like dns-actions and user-actions
+export async function machineAction({
 	request,
 	context,
 }: ActionFunctionArgs<LoadContext>) {
 	const session = await context.sessions.auth(request);
-	const data = await request.formData();
-	if (!data.has('_method') || !data.has('id')) {
-		return send(
-			{ message: 'No method or ID provided' },
-			{
-				status: 400,
-			},
-		);
+	const check = await context.sessions.check(
+		request,
+		Capabilities.write_machines,
+	);
+
+	const apiKey = session.get('api_key')!;
+	const formData = await request.formData();
+
+	// TODO: Rename this to 'action_id' and 'node_id'
+	const action = formData.get('_method')?.toString();
+	const nodeId = formData.get('id')?.toString();
+	if (!action || !nodeId) {
+		return data400('Missing required parameters: _method and id');
 	}
 
-	const id = String(data.get('id'));
-	const method = String(data.get('_method'));
+	const { nodes } = await context.client.get<{ nodes: Machine[] }>(
+		'v1/node',
+		apiKey,
+	);
 
-	switch (method) {
+	const node = nodes.find((node) => node.id === nodeId);
+	if (!node) {
+		return data404(`Node with ID ${nodeId} not found`);
+	}
+
+	const subject = session.get('user')!.subject;
+	if (node.user.providerId?.split('/').pop() !== subject) {
+		if (!check) {
+			return data403('You do not have permission to act on this machine');
+		}
+	}
+
+	// TODO: Split up into methods
+	switch (action) {
 		case 'delete': {
-			await context.client.delete(`v1/node/${id}`, session.get('api_key')!);
+			await context.client.delete(`v1/node/${nodeId}`, session.get('api_key')!);
 			return { message: 'Machine removed' };
 		}
 
 		case 'expire': {
 			await context.client.post(
-				`v1/node/${id}/expire`,
+				`v1/node/${nodeId}/expire`,
 				session.get('api_key')!,
 			);
 			return { message: 'Machine expired' };
 		}
 
 		case 'rename': {
-			if (!data.has('name')) {
+			if (!formData.has('name')) {
 				return send(
 					{ message: 'No name provided' },
 					{
@@ -46,16 +68,16 @@ export async function menuAction({
 				);
 			}
 
-			const name = String(data.get('name'));
+			const name = String(formData.get('name'));
 			await context.client.post(
-				`v1/node/${id}/rename/${name}`,
+				`v1/node/${nodeId}/rename/${name}`,
 				session.get('api_key')!,
 			);
 			return { message: 'Machine renamed' };
 		}
 
 		case 'routes': {
-			if (!data.has('route') || !data.has('enabled')) {
+			if (!formData.has('route') || !formData.has('enabled')) {
 				return send(
 					{ message: 'No route or enabled provided' },
 					{
@@ -64,8 +86,8 @@ export async function menuAction({
 				);
 			}
 
-			const route = String(data.get('route'));
-			const enabled = data.get('enabled') === 'true';
+			const route = String(formData.get('route'));
+			const enabled = formData.get('enabled') === 'true';
 			const postfix = enabled ? 'enable' : 'disable';
 
 			await context.client.post(
@@ -76,7 +98,7 @@ export async function menuAction({
 		}
 
 		case 'exit-node': {
-			if (!data.has('routes') || !data.has('enabled')) {
+			if (!formData.has('routes') || !formData.has('enabled')) {
 				return send(
 					{ message: 'No route or enabled provided' },
 					{
@@ -85,8 +107,8 @@ export async function menuAction({
 				);
 			}
 
-			const routes = data.get('routes')?.toString().split(',') ?? [];
-			const enabled = data.get('enabled') === 'true';
+			const routes = formData.get('routes')?.toString().split(',') ?? [];
+			const enabled = formData.get('enabled') === 'true';
 			const postfix = enabled ? 'enable' : 'disable';
 
 			await Promise.all(
@@ -102,7 +124,7 @@ export async function menuAction({
 		}
 
 		case 'move': {
-			if (!data.has('to')) {
+			if (!formData.has('to')) {
 				return send(
 					{ message: 'No destination provided' },
 					{
@@ -111,22 +133,22 @@ export async function menuAction({
 				);
 			}
 
-			const to = String(data.get('to'));
+			const to = String(formData.get('to'));
 
 			try {
 				await context.client.post(
-					`v1/node/${id}/user`,
+					`v1/node/${nodeId}/user`,
 					session.get('api_key')!,
 					{
 						user: to,
 					},
 				);
 
-				return { message: `Moved node ${id} to ${to}` };
+				return { message: `Moved node ${nodeId} to ${to}` };
 			} catch (error) {
 				console.error(error);
 				return send(
-					{ message: `Failed to move node ${id} to ${to}` },
+					{ message: `Failed to move node ${nodeId} to ${to}` },
 					{
 						status: 500,
 					},
@@ -136,7 +158,7 @@ export async function menuAction({
 
 		case 'tags': {
 			const tags =
-				data
+				formData
 					.get('tags')
 					?.toString()
 					.split(',')
@@ -144,7 +166,7 @@ export async function menuAction({
 
 			try {
 				await context.client.post(
-					`v1/node/${id}/tags`,
+					`v1/node/${nodeId}/tags`,
 					session.get('api_key')!,
 					{
 						tags,
@@ -164,8 +186,8 @@ export async function menuAction({
 		}
 
 		case 'register': {
-			const key = data.get('mkey')?.toString();
-			const user = data.get('user')?.toString();
+			const key = formData.get('mkey')?.toString();
+			const user = formData.get('user')?.toString();
 
 			if (!key) {
 				return send(
diff --git a/app/routes/machines/machine.tsx b/app/routes/machines/machine.tsx
index 56b88c8..ab93056 100644
--- a/app/routes/machines/machine.tsx
+++ b/app/routes/machines/machine.tsx
@@ -12,9 +12,9 @@ import Tooltip from '~/components/Tooltip';
 import type { LoadContext } from '~/server';
 import type { Machine, Route, User } from '~/types';
 import cn from '~/utils/cn';
-import { menuAction } from './action';
 import MenuOptions from './components/menu';
 import Routes from './dialogs/routes';
+import { machineAction } from './machine-actions';
 
 export async function loader({
 	request,
@@ -59,7 +59,7 @@ export async function loader({
 }
 
 export async function action(request: ActionFunctionArgs) {
-	return menuAction(request);
+	return machineAction(request);
 }
 
 export default function Page() {
diff --git a/app/routes/machines/overview.tsx b/app/routes/machines/overview.tsx
index b6bbd24..750ce4e 100644
--- a/app/routes/machines/overview.tsx
+++ b/app/routes/machines/overview.tsx
@@ -6,17 +6,40 @@ import { ErrorPopup } from '~/components/Error';
 import Link from '~/components/Link';
 import Tooltip from '~/components/Tooltip';
 import type { LoadContext } from '~/server';
+import { Capabilities } from '~/server/web/roles';
 import type { Machine, Route, User } from '~/types';
 import cn from '~/utils/cn';
-import { menuAction } from './action';
-import MachineRow from './components/machine';
+import MachineRow from './components/machine-row';
 import NewMachine from './dialogs/new';
+import { machineAction } from './machine-actions';
 
 export async function loader({
 	request,
 	context,
 }: LoaderFunctionArgs<LoadContext>) {
 	const session = await context.sessions.auth(request);
+	const user = session.get('user');
+	if (!user) {
+		throw new Error('Missing user session. Please log in again.');
+	}
+
+	const check = await context.sessions.check(
+		request,
+		Capabilities.read_machines,
+	);
+
+	if (!check) {
+		// Not authorized to view this page
+		throw new Error(
+			'You do not have permission to view this page. Please contact your administrator.',
+		);
+	}
+
+	const writablePermission = await context.sessions.check(
+		request,
+		Capabilities.write_machines,
+	);
+
 	const [machines, routes, users] = await Promise.all([
 		context.client.get<{ nodes: Machine[] }>(
 			'v1/node',
@@ -45,11 +68,13 @@ export async function loader({
 		publicServer: context.config.headscale.public_url,
 		agents: context.agents?.tailnetIDs(),
 		stats: context.agents?.lookup(machines.nodes.map((node) => node.nodeKey)),
+		writable: writablePermission,
+		subject: user.subject,
 	};
 }
 
 export async function action(request: ActionFunctionArgs) {
-	return menuAction(request);
+	return machineAction(request);
 }
 
 export default function Page() {
@@ -73,6 +98,7 @@ export default function Page() {
 				<NewMachine
 					server={data.publicServer ?? data.server}
 					users={data.users}
+					isDisabled={!data.writable}
 				/>
 			</div>
 			<table className="table-auto w-full rounded-lg">
@@ -123,6 +149,11 @@ export default function Page() {
 							// This is useful for when there are no agents configured
 							isAgent={data.agents?.includes(machine.id)}
 							stats={data.stats?.[machine.nodeKey]}
+							isDisabled={
+								data.writable
+									? false // If the user has write permissions, they can edit all machines
+									: machine.user.providerId?.split('/').pop() !== data.subject
+							}
 						/>
 					))}
 				</tbody>
diff --git a/app/utils/res.ts b/app/utils/res.ts
index 1cdf80f..680c864 100644
--- a/app/utils/res.ts
+++ b/app/utils/res.ts
@@ -7,3 +7,30 @@ export function send<T>(payload: T, init?: number | ResponseInit) {
 export function send401<T>(payload: T) {
 	return data(payload, { status: 401 });
 }
+
+export function data400(message: string) {
+	return data(
+		{
+			success: false,
+			message,
+		},
+		{ status: 400 },
+	);
+}
+
+export function data403(message: string) {
+	return data({
+		success: false,
+		message,
+	});
+}
+
+export function data404(message: string) {
+	return data(
+		{
+			success: false,
+			message,
+		},
+		{ status: 404 },
+	);
+}