Same user login could be linked to different accounts

It would be great if the same user login could be linked to different accounts. That could work well for users who are working for multiple businesses, then they can see all the workspaces that they are linked to in one place, and it then becomes easier to manage tasks.

I currently have 2 separate user logins….one for my own account, and then a 2nd login for a different user's account where they have added me to their team.

This means that I cannot see a clash of tasks/deadlines/etc between the 2 different logins.