These little jerks just drive me crazy. To control them you can spray different organic pesticides, such as spinosad or neem oil, but I haven't found them to be particularly effective. Even when I've sprayed all of the trees but one to leave as a sacrificial lamb, they still strike wherever there is tender new growth. You also have to reapply the sprays after every rain (not a problem this summer), and I've pretty much given up spraying anything except on my newly-grafted trees. They're also hard to control because it is very difficult to get the sprays on both sides of every leaf, and once the larvae are inside the leaves they are impossible to kill.
Fortunately, leaf miners don't bother the developing fruits and won't kill the trees, although I'm sure they would be healthier and produce better if the little moths could be controlled. In my experience, they don't seem to prefer any one kind of citrus over another, they lay eggs on any tender new growth that happens to coincide with that part of their life cycle. If anyone has a good solution to this problem I'd love to see it, but then again, the more fruit I grow the less interested I am in spraying any kind of pesticides. I just may have to learn to live with ugly foliage for a few months out of the year.