Is it possible to run seq on only one machine, with vmware or some other software and only one ip-adress ?

I have installed vmware on my winxp machine (yeah yeah I know)
then I've installed Mandrake 8.(2) I think it is.
I've installed seq and everything, BUT I installed it with nat, no other way to get internet access, now, I've changed nat to bridged (now I don't have internet access on linux machine)
But I still don't get seq to sniff my packages, so back to my question, is it possible ??