RBAC (sorta) via Google Assistant possible?

Hi all, I'm new to HA and finally found a problem I couldn't Google away so here I am.

Basically I'm trying to implement some type of RBAC, but via Google Assistant. I've already setup everything as per this article and it works great on my device.

My family will only use GA to control devices. However, I want my family to only be able to access certain devices, not all. If I follow that guide for sharing the Google Dev project I made, it'll share all of them. However, I noticed the code in the config yaml specified the project ID.

So that got me thinking, could I maybe:

• Follow the same guide to create a second Google dev project.
• Duplicate the block in config yaml with the second project id.
• Expose only the required devices to this second project.
• Share only this second project via Google Dev.

Would that work? If so, can someone point me to the syntax for exposing (or hiding) specific devices in the yaml?

Cheers!