Unique Query String for Invited Friends?

Question

I have developed a Facebook Connect application for sending invitations and integrated it with my website. What I want is to send a URL with a query string that contains uid of selected user (from listed friend list) as invitation content.

For example: Suppose, I have selected 4 users from friend list whose uids are (102,105,107,109) and want to send querystrings like this:

For user1- http://www.abc.com/group.aspx?id=102
For user2- ?id=105
For user3- ?id=107
For user4- ?id=109

Along with this I also want to store uids of selected user into database.

Is there is any way to do this?