There is no R12.52 SP2 Agent for SharePoint 2010/2013, so it is unclear what Single Sign On Agent you have installed in the environment protecting the SharePoint Server.
With that being said, Single Sign On Authentication/Authorization "Responses" are "Responses" regardless if this is an Agent for SharePoint or not protecting the SharePoint Server.
As stated by Dennis, the SM_USERGROUP is a special attribute to return all groups the authenticated/authorized user is a member of, and it would not be used to return other response values.
Please refer to the following link which documents Single Sign On Responses;
Responses and Response Groups - CA Single Sign-On - 12.52 SP2 - CA Technologies Documentation
You can define what ever name is required per response, and return what ever LDAP attribute (Database field) value is needed in the response header.