I'm afraid your question is too vague to answer. You can change a user to another by logging in as the other user or using a "work as other user" function. But I suspect your question is about application ownership, logging and so-on, but I'm not sure where.
Badges are a great way to show off community activity, whether you’re a newbie or a Champion.Learn more
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG