Yep, that's at Kalimna on the way into town from the Western direction. It is (or at least was last time I was around) privately owned as in a private airstrip at someone's house, but they were running joy flights out of there a while back.
I was charged $10 there years ago, but later I dropped in and there was no charge even when I produced the cash. It's a little further out of town than Great Lakes but in a better position if you are hitch-hiking it in.
Great Lakes:
lakes entrance, victoria - Google Maps
Kalimna:
lakes entrance, victoria - Google Maps