domestic refers to anything of or having to do with the home. Not with a house, as that's what "property" refers to, but the more abstract concept of home. Words like domicilio (Spanish) and дома (Russian) both mean "home" or "at home" and have a similar (although it may be coincidental) root. Domesticated animals are animals that are tame and have been raised to live among humans in their home (either as food or as pets).
In answer to your question, domestic fronts is more or less "affairs of the home". Family and the like is a domestic issue. I hope this helps you.