Resource whitelist?

Hello im looking to be able to whitelist certain resources so that they are only able to be accessed by certain users, in particular we were wanting to setup FivePD but only allow approved users to go on duty and access FivePD features. does anyone know if that would be possible and if so how to configure that? Ive had a look through the FivePD fourm and this fourm but couldnt really find anything that fits what we are looking for.

Thanks!