Alter upkeep / decay for specific groups only

Is there a plugin where you can change the decay rate depending on which permission the user has? Thanks.

 

Plugin NoDecay

 

^ Doesn't work with permissions.

 

Aa .. now I understand. First wrong translated. )
Yes, I've seen something like this already. It was possible to create a group of oxide and adjust the decay for this group.
Unfortunately, now is not close at hand. I do not remember where. But if I surf and bump, then I'll let you know.

 

the only thing out there is this VIP No Decay
to which it completely turns off decay