CheckMK Notifications disbale for specifig Hosts for Specific Users

We have users who are in Contact Groups that recieve alot of E-Mails for Hosts they do not care about, since they are managed by another User in their Organization.

Is it possible for the User to disable the Notification for specific Hosts but keep on getting them from others?

We have set up notification Rules with no fallback attached but the E-Mails still get sent(Probably by a deafault rule which we do not want to disable)

Any inputs would be greatly appreciated!

Best regards