Connect multiple Alexa accounts with HA / Nabu Casa

Hi there,
I use Alexa with HA via Nabu Casa to good effect. However, our kids each have their own Alexa account and devices in their rooms, since they have their own playlists/music etc.
They would like to use Alexa also in their own rooms to control shades & lights.
Is there a way to include the kids’ Alexas, ideally in a way so the kids Alexas only control the devices in the respective kids’ rooms?

Thanks and regards, I

Stumbled across this as I have the exact scenario and use case.

Have you progressed since posting at all?