Multiple domains

[yperie]

Hello,
Sorry for my bad english. I've read here :

"Your forum is accessable from multiple domains and your forums are configured to show/hide certain forums based on the domain. This is not OK and requires an active vBulletin license for each domain. In this situation the forums appear to have separate content thereby making them separate forums in the eyes of the license agreement. Your forum content needs to be the same for each domain in order to qualify as a single forum."

So, my question is : I've two vBulletin licenses, and two domains, how can I do show/hide certain forums based on the domain ?

Thank you

[Dismounted]

Use of PHP variables. There one that contains the address typed.