Workstation Logon

Help Please,

I have several different machines win98,winnt4,win2000,winxp. The only
thing they all have in common is the netbios protocol. I need to know what
time on my winxp machine, what time each machine connects to the network?
The machines are turned off every night, so when they power on is the same
as when they connect. I can't use each machines clock, it must be the time
on my workstation. They don't all connect to any one server or workstation.

Any ideas at all, I have a few ideas. This seems like it should be simple
and all I can think of is complex procedures.

TP