Reporting Services Filtering

I am on security doubt on how to design a report that must show the accounts
of a customer.
I have an aspx page showing the customer info , then he must push a button a
see its accounts on a report generated by Reporting Services.
Obviously the report can not be accesed via a Customer parameters because
another users could see any customer 's accounts.

I am looking for a soolution for it and I am thinking in generating a temp table with a random Id/Ticket/GUID/whatever an pass it by parameter.