ORS § 107.728
A petition under ORS 107.710 may be filed only in a county in which the petitioner or respondent resides. Any contempt proceedings for violation of a restraining order issued under ORS 107.700 to 107.735 must be conducted by the court that issued the order, or by the circuit court for a county in which a violation of the restraining order occurs. If contempt proceedings are initiated in the circuit court for a county in which a violation of the restraining order occurs, the person initiating the contempt proceedings shall file with the court a copy of the restraining order, certified by the clerk of the court that issued the order. Upon filing of the certified copy of the restraining order, the court shall enforce the order as though that court had issued the order.
ORS 107.728