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As long as you are not bothered about them being able to sniff your packets. Passwords to most login's (hotmail, gmail etc...) are sent across the network in plaintext. So if you just want to check a quick fact on google, then use thier network, if you want to log into your bank, then I suggest using your own network!

Look at the command switches for cmd. cmd /? cmd -q "example.exe" I think, but the documentation is pretty good.

Lol, I was trying to write this self same program myself one day. This is what I came up with. There is no way using the WMI framework to evaluate the user which is currently on the machine remotely. You can however read the registry remotely using the OpenRemoteBaseKey Method in .Net. Create a script that writes the username of the logging in user to the registry. Create a program in a .Net language and create a list of all of the host names on the network, read the registry key that you have written too. Now you must search through a list of hostname and read their registries when you have found the username, you have succeded. Good luck, d3