Can a person be a collaborator on only one team per email address?
You cannot do that via the interface, but if you need, we can add you to other flows outside of your team. Can you email us at email@example.com with some specifics, and we will help you out!
If I were to be added to more than one team, with the same email address, what information would I need to provide you?
Since you cannot actually be on multiple teams at once, you will need to be added by us to each flow in question. So we would need the owner of each flow to email us giving permission to add you to that flow.