Yep, you can save the modified object.
You can save it as a prop, as a smart prop (parent to the hip) or you can export it as an obj file.

On previous test ; I did not even model the basic figure shape.
I imported the rectangle with the sleeves, let Poser do the pushing half way, and export the obj again to refine it in anim8or. (The model stayed in the neuitral pose.)
Start frame was at x=50; z=50 and I did a simulation to x=80 and z=80
Then exported the rough model to refine it, only THEN, I let anim8or do the subdeviding, and then reimported into Poser to de a seond simulation from x=70, z=70 to x=100 and z=100.

It is very easy to work on as long as the poly count stays low. Only subdevide when completely satisfied with the shape. And, save often.

The advantagre of doing it this way ( Poser do the modeling ) is that you only have to build one model of the dress. And Poser makes it fit any figure you want it on.

Tuning can be done with transmaps, displacement maps, and texture maps. You DO not always have to build a new obj. Ance you have a good one it is very flexible. If you have the time to wait for the render, subdevide aonce more, the cloth will flow even better ( but it gets slow)

Good luck eveyone, glad I could give something back.
Tony

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!