I have an issue similar to this check out my post. What I did is i declared everything. I clearly stated that outside my employment i had no further contact with foreigners. I clearly stated that it was bc of my job that i had contact with foreigners including having to give advice for various issues. I stated all the foreign contact that i have close and continuing contact such as family and friends and what they all did for work.
Be very very very thorough! It may take a long time to complete but best to be honest bc this section can pinch you.