The Kangaroos will face England in the final on Saturday night.
Brett Morris added his pair of tries to the total, Lockyer setting up both efforts, the first with a long pass and the second with a well-placed kick.
Gidley improved Morris’ second before Thurston added his first goal by converting Jennings’ hat-trick score.
France – 4
T: Elima (61)
Australia – 42
T: Jennings (22, 27, 56); Lewis (41); B. Morris (45, 50); J. Morris (67, 72)
G: Gidley (41, 50); Thurston (56, 67, 72)
Ref: Leon Williamson
Wakefield skipper Danny Kirmond may be sidelined with injury at the moment, but that has not dimmed his enthusiasm for his club's campaign in the Qualifiers.
Catalans Dragons chairman Bernard Guasch has acknowledged that his club needs to work harder to produce more French players.
Catalans Dragons have confirmed that Academy graduates Lucas Albert and Fouad Yaha have signed long-term deals at the club.