You need to set the newly registered users group ability to see the other forums to NEVER.
NEVER >> YES >> NO
Gardus wrote:1) I cannot differentiate the visibility of the sections between newly registered and registered.
Once a user register he goes into both groups!
That's because they have a yes permission for the registered users group overriding the no you're giving to the newly reg'd group.
Users need to be in both at the same time as the NRU group is designed to stop them doing some of the things you don't want.