Sorry if its already been mentioned but cannot find it on the search

I want to have different forums for specific members. 

ie 
audi cars / forum for members interested in audi cars only so only them members can view and write in that forum

ford cars / for members interested in audi cars only so only them members can view and write in that forum

Its not about cars but that's the general idea. I know I can have an admin section for just admin that no one else can see but can this be done for other groups etc

Yes this can be done for others. At the Administration Panel => General => Categories & forums => Press the at the forum you want.

Now you can set which groups can see that forum.

Brilliant I have it now, many thanks for all your help can admin set this as solved now.

Glad to help

Topic solved and archived.