https://www.plesk.com/kb/docs/domain_restriction-exe-prohibited-domain-names/
domain_restriction.exe: Prohibited Domain Names - Documentation from Plesk Knowledge Base
The domain_restriction utility is used to manage the list of domain names that are prohibited when users create sites. This prevents users from creating sites...
domain restrictionexeprohibitednamesdocumentation
https://www.zoho.com/creator/newhelp/app-settings/configure-domain-restriction.html
Configure domain restriction | Zoho Creator Help
Learn to configure domain restriction and restrict access only to the users whose email addresses belong to the verified domain.
domain restrictionzoho creatorconfigurehelp