Question Per-Gamemode Permissions [PermissionsEX]

So I own a prison server and my Admins still clearly play on the server and they mine, but when they mine they sometimes break other blocks which they shouldn't be breaking (the walls of the mine) is there any way with PEX to only allow them to bypass the worldguard region in creative mode. Kind of like Per-World permissions but Per-Gamemode permissions... This would be a really cool addition to PEX if it doesn't already have this (which I don't think it does since I looked through the entire Wiki)

Example:

groups:

admin:

permissions:
- essentials.gamemode
worlds:

prison:

gamemodes:

creative:

permissions:
- worldguard.region.bypass.prison​

Also, if anyone wants to update their own version of PEX that's able to do this that would be great