There is an option to show particular question in External job board and make in invisible in Internal job board and vice versa.
1. Go to FORMS > Application form
2. In the form, under each question, there is a tick box that says 'Only External Board'.
3. If the above is ticked, the question will only be visible in the External job board and will be hidden in Internal job board.
4. If unticked, question is visible in both External and Internal job boards.