c-treeACE Server now supports limiting users to a specified number of concurrent logons based on their user name and/or group membership. By default, these limits are zero, meaning no limit.
The ctadmn utility's menus support two new options to administer this capability: User Operations menu > Change User Logon Limit and Group Operations menu > Change Group Logon Limit.
The SECURITY() API function supports two new modes: SEC_CHANGE_USER_LOGLMT and SEC_CHANGE_GROUP_LOGLMT.
See User and Group Logon Limits in the Security section.