If I’m enrolled in one iOS developer program with a specific Apple ID, can I add that exact same account to another iOS developer program.
In the case where I’m working for two sellers in the app store, is it possible and/or desirable assuming I don’t mess up and confuse things on any one occasion?
Possible. If you enroll in multiple teams(programs) then after login you have to select your team. In each team you work in accordance with your role and permissions.