YES I'm still using prosper, prefer it over everything out there........ OLD SCHOOL marketer I am!
Anyways....
I can't figure out how to put the title but basically my landing page has lets say 8 links all pointing to the same offer think of a farticle.
How do I track each individual link so I know where people are clicking on the LP? Can I added any variables anywhere on my outbound link? i.e /offer1.php?id=topbanner
Much help from the old school heads would be appreciated 
P.S - I've used 
Did you try advanced landing page?
But, sure you can add for example subid on you affiliate link and see the result on affiliate network platform