You can control resources available to users with Sybase IQ Login Management, which lets you limit the number of connections to a database for all users or for an individual user, set password expirations, and lock out individual users so that they cannot connect to the database. See “Managing user accounts and connections”.
For more information on settings that affect memory and other resources available to user connections, see Chapter 4, “Managing System Resources” in the Performance and Tuning Guide.