Complications for Smart Lipo on Pubic Mound?

I am not aware of Smart Lipo providing any additional advantages over conventiional liposuction in this particular area.
Conventional liposuction is likely sufficient for your purposes, but I guess you could also contemplate ultrasonic assisted lipoplasty.
If your condition is associated with massive weight loss sometimes the better choice is to proceed with a pubic lift in which the loose skin AND fat is excised and the pubis is lifted to a higher more aesthetic position.
In answer to your speific question laser assisted lipolysis, if performed correctly, should not have any major complications nor should the fat return.
I hope this helps.

There is always a risk with surgery, even if small.  You should see a Board Certified Plastic Surgeon for this procedure, and they will advise if Smart Lipo is needed.  There is typically not loose skin in the mons so the tightening element would not be as important.

Liposuction of this area is actually quite common and safe, with complications occurring rarely. "Smart Lipo" uses a laser, which can cause burns, and probably offers no real advantage. There are of course different opinions on this subject but traditional liposuction should work fine.

Any liposuction technique should accomplish reduction of the fat from the mons.
With any liposuction technique, if fat is removed, the skin stays the same, so drooping can occur. Often patients come with the complaint of excess fat of the mons, and the problem turns out to be a combination of excess fat plus drooping of the tissue.
The reports of tightening of the skin with laser lipolysis are not yet proven, since tightening of the skin from below endangers the subdermal plexus, the blood supply to the skin, and could cause burns.
There is an additional theoretical concern that with laser lipolysis, more of the retaining ligaments will be defeated (damaged by the laser beam), so the mons could potentially sag if there is underlying laxity. This is purely theoretical, but a possible issue in patients with borderline looseness of the mons.
Laser liposuction involves a laser, so burns can occur, as they can with UAL (Ultrasound liposculpture). These burns do not occur withconventional liposuction, tumescent liposuction, PALS or BodyJet techniques.

I almost always incorporate SmartLipo with Traditional Lipo in the Mons or pubic fat pad. I have seen firmness which transiently  appears in the fatty layer after this procedure, but external ultrasound treatments soften this almost immediately. I have seen some really nice improvement in contour when this area is treated along with abdominoplasty or abdominal liposuction. Nerve damage has never been an issue.