The docs say you can provide an HTTP port argument:
python manage.py runuwsgi http=1234
That throws an error:
usage: manage.py runuwsgi [-h] [--version] [-v {0,1,2,3}] [--settings SETTINGS] [--pythonpath PYTHONPATH] [--traceback] [--no-color]
manage.py runuwsgi: error: unrecognized arguments: http=5000