I snagged the info below right from the Patty Kaz website. The selection process is described in detail. I remember asking the same question back in 2010 when UNH's Kelly Paton was one of the 3 finalists. They don't usually publicly state who is on the 13 member committee that selects the 3 finalists and the award winner.
ABOUT THE PATTY KAZMAIER MEMORIAL AWARD
An award of The USA Hockey Foundation, the Patty Kazmaier Memorial Award is presented annually to the top player in NCAA Division I women’s ice hockey. Other selection criteria include outstanding individual and team skills, sportsmanship, performance in the clutch, personal character, competitiveness and a love of hockey. Consideration is also given to academic achievement and civic involvement.
The award selection process begins in February, when NCAA Division I women’s ice hockey head coaches are asked to nominate players for the award. Players who are nominated by two or more coaches are then placed on an official ballot, which is sent back to the coaches to vote for the top 10 finalists. An independent accounting firm tabulates the ballots.
The three finalists, as well as the recipient of the Patty Kazmaier Memorial Award, are chosen by a 13-member selection committee comprised of NCAA Division I women’s ice hockey head coaches, representatives of the print and broadcast media, at-large members and representatives of USA Hockey, the National Governing Body for the sport of ice hockey in the United States.