Olympic team-mate Katya Crema also made the podium in both races, winning the first then collecting silver in the second.
Kneller, 22, was too good in the final of the opening event, out-skiing the Russian duo of Georgy Kornilov and Alexandr Koryakovtsev, while Mt Buller's Anton Grimus, the fastest qualifier, finished in fourth position.
Grimus took silver in the second event behind Kneller, with Kornilov adding a bronze to his weekend's tally, while Luke Laidlaw filled fourth place.
Crema claimed gold in the opening women's event ahead of the Russian pair of Julia Livinskaya and Violetta Kovalskaya, but lowered her colours to Livinskaya on day two.
Sami Kennedy was the best of the remaining Aussies, finishing in fifth place in each of the two races.