Need help, IP spoofing virtual computers

Hello forum.

I was hoping you could help me. so let's talk about "gaming" websites.

my question: is it possible, to make multiple virtual computers look like (from the website admins point of view) that they are all connected to the website through a different network.


In detail: most "gaming" websites only allow 1 account per person, i wanted to avoid this rule. i initially found a way of doing so, by setting up multiple virtual computers. But its easy for the admins to see that they where all connected through the same network. 


any ideas?