Alerting for specific user or conditions

Hello there!

Our question or what we try to achieve: Is there a possibility or best practice of how we can alert/notify specific users in case of alerts for specific hosts?

Lets say we monitor (Fleet managed, Agent) a VDI (Virtual Desktop Infrastructure) machine Y which are tied or owned by user X. Now we want to build checks that trigger alerts only for user X in case of certain conditions only matching for machine Y.

Maybe we're on the wrong track but i dont find any suitable way regarding possible Connectors. In case of basic mailing, there i cant find any variable/option to make it possible.

Any ideas or help is appreciated. Thanks in advance!