SL Lan Party

Ok. Here's the situation. I got a few friends willing to try SL. They're tired of hearing me rant about my SL friends I guess. So I thought that we could all play at my apartment because I have cable modem internet access. So here's my question....

Will several people (2 or 3 at the most) playing on their own computers be able to play SL at the same time on the same external IP address (for the internal lan, each PC will have its own unique IP like 192.168.0.x)?

Thnx
Winter