Thanks a lot Tiago,
I trayed something like this on webadmin
 

I changed "permissiva" by "sessão única"
and that's what I want

Genio doesn't have this functionality.

But there are ways to mitigate this need.

One of them is to limit time of each user will have open session.

Another way will require some developement and will need to activate on WebAdmin the audit for user login. That will give to you all information about logon, logout and try to access for each user. Each row in that table include host/computer name, timestamp and some more information.  With that information you can try to disallow to login in new computer when have some open session.