XF 1.3 Is it possible to detect and stop registrations for same ip?

[RAHSTYLES]

say if ip 00.00.00 registered already and tries to register second time using a diff name but i dont want to ban them i just dont want them to register twice?

 

[Allan]

Yes, with this add-on: http://xenforo.com/community/resources/multiple-accounts-detection.3105/

 

[RAHSTYLES]

Thank you but does this detect ips that are not on the banned list?