Confusions about teams subscription, private space

I have a quick question, and I searched for almost every official intro and no specific answer:

I want to have “user-only” private chat with GPT-4 and dont want to share every message to all users in the workspace. Can we set specific subsections in the workspace, that everyone has its own workspace (totally private, no sharing to other users).

Or, anyone with teams subscription directly has GPT4 access in their own private accout?

I just believe openAI’s product design is pretty anti-intuition sometimes…