This privilege system only comes into play if the user does not have WebMaster rights.
The WebMaster has full administration rights, so there's no point in limiting him to a list of sites.This feature is available on Artica v4.50 Service Pack 1 or 4.50 with the Hotfix 20240107-16
Artica has several methods for identifying users.
These include its local database, the local LDAP database or an Active Directory database.
Please refer to this Article to use one of them.
Privileges are associated with groups, not users.
This method merges or adds privileges when groups are associated with a user.
In this logic, if you assign the privilege of domain1.com to group A and the privilege of domain2.com to group B.
If the user is a member of both group A and B, it will have authorizations for both domain1.com and domain2.com.