(a) Participation by a petitioner in a proceeding before a responding tribunal, whether in person, by private attorney, or through services provided by the support enforcement agency, does not confer personal jurisdiction over the petitioner in another proceeding.

(b) A petitioner is not amenable to service of civil process while physically present in this state to participate in a proceeding under this article.

(c) The immunity granted by this Code section does not extend to civil litigation based on acts unrelated to a proceeding under this article committed by a party while present in Georgia to participate in the proceeding.