Yes, simply click on the "gear" icon via your main itineraries section of the app:
Under SETTINGS you can manually switch between different App Credentials (UserID or Email and Passcode) in order to view different traveler profiles and itineraries. Click the back arrow in the top left corner to apply. A REFRESH of the app is required to then pull through the updated information.
*Please note, this is currently available for IOS mobile phones only