Mass. Gen. Laws ch. 209D, § 2-202

Section 2–202. Duration of personal jurisdiction. Personal jurisdiction acquired by a tribunal of the commonwealth in a proceeding under this chapter or other law of the commonwealth relating to a support order continues as long as a tribunal of the commonwealth has continuing, exclusive jurisdiction to modify its order or continuing jurisdiction to enforce its order as provided by sections 2–205, 2–206 and 2–211.