Yes. Here are the steps:
1. Load the aircraft you want to add smoke trails to.
2. In the Aircraft menu, choose "Edit [name of your aircraft]." The aircraft editor will appear.
3. In the aircraft editor, expand the "Airframe" item in the tree selection in the lower left.
4. Right-click on the "Fuselage" item, which is under the "Airframe" item. From the menu that pops up, choose "Add Smoke Component." The new smoke component will appear in the tree and will be highlighted.
5. Edit the parameters of the new smoke component to your liking.

If you want the smoke to come out the wing tips, you will need to do step 4 twice (one for each wing) and change the "Location in Parent" vector's X value to get the origins to be at the wing's tips.