geodjango floppyform issue

[dhirajshinde121083]

Hi i am new to geodjango floppyform, i have some difficulty
i working on application where i need to restrict user to create point or line-string(route) withing certain geofence(city), so in short while user creating route map would allow to create point and linestring (route) in certain regien by keeping other part of map disabled ?
e.g
i want to make entry for bust stop as a point A
but while creating i want to restrict user so that point should be created in "XYZ" city region of the map only, it should not allow user to create any entry out of the bbox of XYZ city, is it possible ?
can someone please guide me ?
my map contain 100 such cities