Can an Affiliate Use Their Own Payment Processor?

This article answers the question, can you use a different payment processor for each of your websites? 

You cannot use a different payment processor if you have websites under the same DecoNetwork account. If you are on a multi-store plan and you have different affiliate stores set up under that plan, all the affiliate stores will run the same payment processor.

If you want to have multiple websites that use different payment processors, you will need to sign up for a separate DecoNetwork account for each different payment processor that you want to run.