How do I

[mickerob]

Can i only give access to a forum by usernames ?
Just say I have a forum called Nokia ,And I want to give access to Bob,mike and chris can this be done ?

[Spaceman-Spiff]

install the application mod, and allow only the ones you know/want to enter the forum
follow the white rabbit link in my signature

or

if what you want is to allow a few people to enter a certain board/category, you'll need to create a restricted category
read the admin faq post to learn how to do it