2 SBS 2003 DC on same network, but different Domains

Is it possible to have two SBS 2003 servers on the same physical network, but both with different Domains? The two SBS 2003 servers will not need to communicate with each other. They will share a single Internet connection. This is the case of a part of a company is separating from its mother company, but not moving. The break off company wants its own network setup. Thank you for any guidance you can provide.