Is it possible to have more than one multisite/prosite configured to use the same PayPal account?

I have a multisite setup on a subdomain, as well as one setup on the main domain. Both using ProSites. Is there any way to use the same PayPal account with both sites? Or do I need to create an additional PayPal account? I'm having trouble figuring out how to set up PayPal with the two separate IPN addresses required. Am I missing something?