On StackOverflow Careers, I regularly do a search for candidates within 30 miles of London. I often get matches with candidates who have listed that they want to work in France, and expressly not listed London, England, Europe, or Earth (any of which would legitimately match the search). Please tell the StackOverflow server that France is close by, but not within 30 miles, so it shouldn't show up in my searches.
Update: For an example of the search in question, I entered no keywords at all and just the single criterion "within 30 miles of London, England". Among other results, I got the candidate with ID 16102, whose list of desired workplaces includes France but no other European location.