Enhanced functionality of visibility

On our instance we use the feature "Restrict users to only share with users in their groups"
But we would like to go further, to even restrict sharing and seeing users within a certain group.
There could be an option in Configuration -> Sharing

We want to provide anonymity in certain groups. Let's call the group "Customers". All customers should have direct access to certain files through Groupfolder and to certain collectives through Circles.
But they should not see or interact with each other.

In addition, it would be good if the Customers group could share with the "Team" group, without beeing part of it.

As a possibility there could be more functionalities in the Circles app at visibility.

Here is an example of how it might look:

Start in the Circles app's visibility functionality and review how Configuration → Sharing currently handles group restrictions. Compare the requested Customers and Team behavior with access through Groupfolder and Circles; done would require an agreed design and implementation that preserves customer anonymity while allowing the specified cross-group sharing.