Is it possible to present different customers with specific payment options - searched the forum/faq's but can't find an answer.

My customers will all be trade, and will be approved before allowing them to purchase. Some will be "monthly account" customers, and some will be required to pay by credit card [pro-forma invoice would be nice too]. What I am trying to avoid is a credit card customer being offered the monthly account option when he gets to checkout.

BTW - I have the super orders add on installed if that helps, but i am guessing that if this is possible it will be part of the core features somewhere.

Many thanks