There is some functionality on this already. However, this is all or nothing right now. If an employee turns on the "Security Group Links" for one perspective, it forces all perspectives to review the security settings. In this case, two perspectives were set up for the "CORE TEAM" as seen below. Once that was enabled, members of the CORE TEAM were only able to see those two perspectives and the perspectives available to them dropped down to two.
We would like to see the functionality change to where the security settings below will have an effect on the one perspective that is being designated as secure. Right now, companies will have to go in to each perspective in order to give access to the needed individuals when really they are just trying to lock down a few high level perspectives.