There is permission "timedpermissions.use", it allows you to use chat commands:

• /revokeperm -- Revoke a timed permission from a player
• /grantperm -- Give a player a permission for a specific time
• /removegroup -- Remove a timed group from a player
• /addgroup -- Add a player to a group for a specific time
• /pinfo -- Show active timed permissions and groups of a player

How to give the player permission to use only this command:

• /pinfo -- Show active timed permissions and groups of a player

It is necessary that the player could know the time of his permission, but could not use other commands/permissions of this plugin.

I've marked this as a suggestion for me to implement.

Thank! We look forward to!

I was looking for the exact same thing but found a quick and dirty way to do it i guess?

line 371 of the cs file has
[Command("pinfo"), Permission("timedpermissions.use")]

change to

[Command("pinfo"), Permission("timedpermissions.pinfoview")]

then grant each group you want to view pinfo with
timedpermissions.pinfoview

only downside i see is that everyone who has this perm can check other players but im sure its not that much of a issue until maker maybe implements it better

Thought i would share anyway