Some G3 hair (and other stuff) can be imported into Poser using the techniques in this thread: @4379596 I got lucky with the item pictured, but the feedback from people who've tested more hair than I have is that the majority of it doesn't work.

It's a bit more work, but an alternative method is to use Dimension3D's DSF Toolbox, sold at DAZ. That will convert the DSF format that DAZ uses into an OBJ which can be imported into Poser - then it's up to you to position and scale it, and apply the materials.