If you've used the Url generator, you will be able to track the income traffic and it will be considered as a "campaign". But the affiliated won't have this information.

To enable that, the affiliated will have to use a plateform dedicated for affiliation purposes or (if it's a small website or similar), the best will be to create an event on analytics and edit the analytics code on its website to track the event. This event has to be edit on the affiliated analytics tracker, not on yours.

You can have more info on this page : https://developers.google.com/analytics/devguides/collection/gajs/eventTrackerGuide

Cheers