ZoneCD Known Users

I am looking at adding an additional class to the ZoneCD. One that will be between Public and Trusted, a Known User class. All Known users will have loosened restrictions but will not be fully trusted. Known users will bypass the content filter, but I am not sure on the port restrictions.... I am considering opening port 25 for email, maybe some other normal ports like 21, 22, 8080.... or maybe I will leave them all closed, I am undecided.