OH yeah I use it on multiple profiles. Its easy to tell all you have to do is look at the URL tag and you can tell by the ID number at the end.
Like if they looked at mine it will look like this:
URL/Tag : http://profile.myspace.com/index.cfm?fuseaction=user.viewProfile&friendID=406773530
however if they look at my kids (since I have it on theirs also) it will look like this:
URL/Tag : http://profile.myspace.com/index.cfm?fuseaction=user.viewProfile&friendID=123456789
Here is a video on how profiletracker.us works. Watch it and you can see what I mean when I say its a sweet tracker if you looking for one.
woohoo! it works great! thanks again everyone!!!