Got your PM. Yup, all you have there is one private IP address. If you are not the network admin then you'll need to get them to forward the
directplay ports:
If you are behind a router you will need to forward ports 2300-2400 TCP&UDP and 47624 TCP to login. (allow pings from the WAN) Port forwarding applies to a static LAN IP.
(that's for EAW/OP, the SFC3 ports are posted elsewhere, I ferget right now, 2302,2303,6073 udp I think?)
Or you could get a public IP address, though if this is a work environment, I doubt your IT guys will be willing to do either for you (unless its a small shop or you're the boss...).