Multi-Owner Cart system

["Jerry Fowler" <jerry@robisondesign.com>]

Greetings Minivenders.
Here is my imponderment:

I am operating a website for a Multilevel Marketing Vitamin company using
a minivend cart. The vitamin company sells their members web pages
under the company's domain so that the members can sell vitamins online.
The funds will be deposited into the vitamin company's account, and sales
commissions will be disbursed to the members on a monthly basis.
The cart system needs to be set up in such a way that people can
purchase vitamins from the individual member's page.
Now that you understand my needed setup, here is my question:

How would I set up a cart in such a way that Minivend would track
the member ID and submit it along with the order?

Thanks,
Jerry Fowler
Wave Netsystems