sql filtering unwanted data #182

I am using 21.0.0 version nextcloud.
In that i have installed 4.7.1 User and Group SQL Backends application for external user login authentication. In that i am connecting to PostgreSQL 11.6 Database

Login authentication is working fine.

But in the PostgreSQL database i have users of multiple domains.
Like one user is user1@example1.com, another user is user2@example2.com ie different domains.
When admin login to the admin portal it shows users of both domains.
I need to setup such that if admin of example1.com domain logs in to nextcloud it should show only example1.com domain users. If admin of example2.com domain logs in to nextcloud it should show only example2.com domain users.

How can i achieve this, please can any one help.