Role

Hi,

I created a certain role in which i put in the authorization object - s_tcode - authorizations to a few transactions.I gave this role to a few users.Now i need to deny access to a certain transaction to a specific user who has this role.

My question is how do i deny access to a specific transaction to a specific user but all the other users with the same role will still have access to this transaction

Regards,

Moshe