Go to the LDS website
www.familysearch.org, and from the catalog search the place names you are looking for. They have baptism records for Menzonio for the period 1680-1899; and the parish (or church) of San Lorenzo in Lugano 1569-1899. If you are close to a Family History Center, you can order the microfilmed parish records and research them. If you have not researched such records, they may prove a challenge at first, but will eventually be very rewarding. Good luck!