Would this be selectable for pop-ups and view style info or as editable data? In the underlying feature layer if you post as a view, you can enable only certain permissions or attribute editing. I am not sure for your simple app but the code logic would most likely follow the same path of setting up permissions and layer settings per item in your app. If the app doesn't allow that, then perhaps through the data source itself could this be done. A little more technical than I am able to answer with a sure result, but hopefully this will help set you and the right path to answering your question.
Best,
Jansen Lyons - Records and GIS Section - Public Works - City of Rio Rancho, NM