Hide COD payment method from certain customers?

Hi

I would like to be able to hide certain payment methods from certain customers. Specifically I'd like to hide the COD module from people who didn't go and collect their order in the past.

I have already modified the module so it will be hidden for specific products and also under/over a certain total amount, but I can't seem to figure out how to do a check against customers ID.

Could any one give me a hint (or better yet, a solution!)

Nobody even have a a suggestion or a idea?

The signed-in customer can be identified by examining the value in $_SESSION['customer_id'].

Of course, why did not I think of that... Thanks a bundle, it worked like a charm!

A plugin/feature like this is something that is way over my head programming-wise, but a feature I would have liked to see, is the possibility to choose allowed shipping/payment methods on product level, and also for the same reasons stated above, by customer.