domain ban ?

Hello frnd im using buyd domain from forumotion.Maybe My forum banned from online guard mean after i will use that buyd domain to another forum ryt ?

No if your forum was banned you won't be able to use that domain on another Forumotion forum. Though you can create another forum on Forumotion as long as it does not violate the terms of service,but you can't use the same domain name.

oh ok i will buy domain in other site and i will atach in forumotion site its possible? after forum banned mean i used that domain again to another new forum ? or cant

It depends. I don't know the reason your forum was banned. But it must have been because your forum violated Forumotion's terms of service. So you should read the terms if you don't want your next forum to be banned.
Here-https://www.forumotion.com/en/create-forum/terms-of-service.htm