Lens in the link is the correct one: " f2 Four Thirds 4/3 Zoom Lens". Also not a MFT lens but compatible with MMF-3 adapter.
Olympus lenses don't support DFD which is the improvement of CDAF invented by Panasonic but it's just improving AF speed somewhat. All lenses support CDAF though because it doesn't need any support from the lens to work. All MFT or Four Thirds lenses also work just fine with CDAF bodies (Panasonic) because even Olympus used only that in their first MFT bodies. Very latest Olympus Pro lenses might have some internal optimization for Olympus PDAF system but it doesn't mean they would be slow on panny bodies either.
I have not seen any official statement about DFD support on Sigma MFT lenses but my Sigma 56mm f/1.4 has a very fast and accurate AF on Panasonic body as long as there is reasonable amount of light available. IMHO it seems that CDAF is more critical to the amount of light it gets than any specific optimization in lens design and f/1.4 is practically as fast as they get.