how to restrict users to login to one certain intance? thanks
our production system have two servers ,one runs oracle and central instance,another runs dialog instance, we defined a group that contains the two instances. now, when a user login from their GUI, the system will automatically adjust which server is optimaical , then dispatches the user to login to this system. I want to know how can I restrict that some certain users can only login to one server, and some others can only login to another server.