Jim Bisenius, the hedge fund manager whose arrest for soliciting prostitution made national headlines Wednesday, is a prominent philanthropist. Bisenius and his wife, Jan, gave $1 million in 2010 to the Master’s Plan Foundation, a private foundation that shares the same Portland address as Common Sense Investment Management, the hedge fund of funds that Bisenius founded in 1991. The $1 million donation by the Bisenius family was the bulk of the foundation’s 2010 revenue. It also received a $20,000…