Hello stravelslots , yes each leg will post in the year flown. Your best bet is to call reservations and have them look up the PQP for each segment. They will have access to view that information for you.
You can also get a sense of how the PQP will credit via http://mystatus.united.com where you can view your future bookings and how the segments and PQP will help you reach your 2024 EOY goals.