Hi, I want to trace some client network accounts. I want to know at once when they actually logged in or if they r logged in now on which computer. I had a very nice utility called "net watch" but i lost it . i tried to search it but could not find it again in google.

Some users in my network are on to nasty things trying to illegally enter in other's computers etc....i want to catch them red handed . Any kind of tools u would suggest or a nice plan including "server-and-client-side-settings"?.

I consider them as moving targets coz they would use any machine in my old NT4.0 network with some windows2000 clients and all other NT4.0 clients.

How do i trace down "moving targets"?........

I want their passwords...........whenever they change........(i'm prepaired to go to extremem lengths to trace them down) and anyother information i can gather.
PLease Help