The console of Ory network supports workspaces, projects and members, guess this uses Ory under the hood as well? Any guidance on how to setup such an hierarchical structure using the ory stack?

We use Keto (permissions) and Kratos (Identities) for this under the hood with some custom code in between to make it all work nicely with each other. I don't think we have any of that publicly available at the moment unfortunately, but @steep-lamp-91158 might be able to share some more details.