URL + different parameters = duplicate content?

[Halfdeck]

will the site be penalized for duplicate content

A site rarely gets penalized for duplicate content, especially when its due to query strings, which happens alot. Just becareful stacking too many negative quality signals on top of each other (e.g. simultaneous use of keyword-loaded URLs + a ton of cross links + hidden links + thin content page + not alot of legit-looking backlinks)

My idea is to pass the paramater on the site ... in order to get a full backlink.

You're thinking too hard. If you want to rank for [blue widget] just make the page and link to it internally. If the content isn't on your site, well, nothing you do will help.

This link doesn't redirect back to you:

"http://lsps2007.cam-content.com/Redirect.aspx?Target=GirlInfo&SystemID=erotiksexcam-com&ADR=&Pseudo=GeileVictoria"

It returns a 200 and uses JS to open your site up.

If you want backlinks, do it the old-fashioned way: either create content and link internally or go hunting for some backlinks.