As I say, I think the problem with this is that if you are an administrator, you will get ALL the logins on your network when you run this, no matter which PC you specify.
Perhaps a local solution might work better. Like a small srcipt that runs when the user logs in and posts their login to a SQL table, for example.
Other than that, I am not sure how to resolve this since it is more an administrator issue, and not a developer issue. Sorry for that. Perhaps if you look up the "Scripting Guys" at
www.microsoft.com.
mmcdonal