Yes, it is possible to have a Tummy Tuck done at the same time as Tubal Ligation very easily. I have performed a Tummy Tuck along with a Gynecologist doing a laparoscopic Tubal Ligation.
Abdominoplasty procedures are commonly performed in conjunction with a gynecologic procedure. This may include a hysterectomy, oophorectomy, or ligation of the fallopian tubes. Of course, you should seek the advice of experts. A plastic surgeon is the only subspecialist qualified to perform abdominoplasty correctly whereas a ob/gyn is the only subspecialist qualified to perform surgery on your reproductive organs.