Yes, that is possible.

After opening the app, tap on 'Favorites' below the search window and enter your favorite zones using the 'Add to Favorites' function.
Or select your favorite zone and tap on the star to the left of the zone number. In both cases, a window will open where you can give your favorite zone a custom name. Confirm by tapping 'Add to Favorites' - done.

Your favorite parking zones are listed on the first page under favorites and are ready for your next parking session.