Yes, you can “wall off” some tabs or components using the visibility conditions. The visibility conditions would be based on “If email is not empty”…
If the email is not empty then the user would be able to access that information that was walled off.
You can even extend this further by building your own custom sign up form which @Robert_Petitto does very well in teaching in his gamification App, the first tutorial covers this extensively. It also covers some visibility conditions that you can use to customise the user experience for the different types of users.
Some components are also hidden using this method so that they only show of user has a profile or if they don’t have a profile which means they are guests.