/permission does not work with the provided hint

Are you the host (if local multiplayer) or realm owner (if on a realm)?

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Yes, Im the local world host

/permission isn't an existing command.

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However, this issue has been temporarily closed as Awaiting Response.

Are you able to achieve the desired result with /inputpermission?

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No the /inputpermission command only affects players movement, the /permission command affects his permission status (visitor, member,operator etc.) 

Is this still an issue in the latest version? If yes, can you please add it to the affected versions (or mention it if you are not the reporter)?

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Hell there. this is still an issue in the latest version.

the situation for me is 
I am in a realm
i am not the realm creator 
and /inputpermission for movement is completely broken.

Right. At client-side, when you input /permission in chat, you will see:

/permission set <player: target> [permission: PermissionLevel]

But it's not working. I talked with my friends, we think its correct syntax are:
Server-side only:

/permission list
/permission reload

Client-side only:

/permission set <player: target> [permission: PermissionLevel]

Maybe the client-side usage requires a too high permission level, and cannot run.

(Note: The server-side usage runs normally.)

You can also see Commands/permission - Chinese Minecraft Wiki.

also see https://minecraft.wiki/Commands/permission