take a % of sale from different merchant account to a private account (Q1 of 3)

Is there a way to transfer money from a sale to a private account instead of a merchant account. I know i can do it manual with paypal but can i do it automatic when a sale happens.

And can I associate a product or shop with a certain merchant account and another product/shop to another merchant account and then take a % of the sale to a third (own by me) account.

Kind regards
Lars Baun
http://www.larsbaun.dk
http://www.enunikgave.net