How to have two computers play under same IP?

[vans19]

I am playing on P1999 server with my PC and planning to buy a gaming notebook for my gf so we could play together but I am worry we are under the same IP and we may not be able to play at the same time.
May I know if there is anything I could do regarding this?

Thanks.

[Tankdan]

petition/exploit section

[Grimjaw]

its called an "IP Exemption"