Restrict email notification to use requesters organizational email address only

I was wondering if anyone else has experienced this issue and if so, how they have resolved it.

We have our People and Culture team with a separate Workspace as IT and as their interactions with employees and potential candidates require interaction with people via a personal email address this can sometimes cause issues when forwarding or including key stakeholders into email communications. If you are not careful your emails can sometimes be sent to a personal email address instead of a organizational email address.

Is there a way to restrict access to personal email addresses to only our P&C workspace? I can see that Requesters sits under the Global Workspace so not sure if this is possible.

Any insights would be greatly appreciated