Prevent Access to Folders within a Worspace

[donegalforever]

It would be great, if you could prevent members from seeing certain folders and their contents within a workspace.

For example, I create a workspace, and invite a customer to join to see drawings and specifications.

I do not want them to see a folder that I have set-up for that project that I would like to share with a supplier.

Likewise, it would be nice, that the only people that can be seen are those that are allowed to see each other. I guess that the simplest method would be to create a workspace within a workspace? Maybe this is already possible, but I haven't seen it?