NIS 2011 - 3 computers, that means 3 different IP's ?

Hi there, I'm using NIS 2011, it's for 2 years and for 3 computers, does that mean I can use it for another IP if I want ?

I mean my brother has another IP adres and lives somewhere else, can I give one to him or is that forbiddden cause it will block my account ?

 

 

Regards...