Wouldn't that be nice? I get suggestions for people born on the wrong continent. The worst has to be with people surnamed Smith. maybe if you were to repost this with "Feature Request" someone could figure out how to add it.
One problem I see with that; One person is born in Portland, Oregon and another in Oregon, or Portland, or even Ore. You would want the system to present these to you as possible matches even though they were born in different places.