Row level security - Automated for multi-company
Multi-company installations may wish to segregate users to have access to different companies' data.
In this case, in DataSelf Web Server, add user Groups for each company.
Add each user to as many company Groups as desired.
In DataSelf Desktop, utilize the ISMEMBEROF() function that identifies the current user's group memberships.
This type of row level security, with user Groups, is best applied to the data source AFTER the extract is created. That way, the user list remains dynamic, as new users are added or the group memberships change.