It's pretty similar. The clothing part, anyway. Load the figure, load the clothing, add the walk cycle. Run the cloth sim (with some drape frames), and the clothing will follow the figure. Edit out the beginning frames, where the figure is dropping her arms and getting into walk position.

This is an old gif I made, using Stephanie Petite. (Sorry for the low quality. The file size limits were brutal back then.)

https://randomphotostash.tumblr.com/post/652297973826502656/windblown

Basically, it was easy because I only showed her upper body. I used a walk cycle someone else made. You might be able to find a free walk cycle someone else made for your figure. Or use one made for a different figure; they often work reasonably well, with some small adjustments.

This one, I showed the whole figure.

https://randomphotostash.tumblr.com/post/652297952059179008/the-dancer

It was basically just a bunch of different poses, applied in sequence, with Poser interpolating.

If you actually want to show the figure walking around the room, you need to have a walk path. Here's a sample of dynamic clothing with a walk path (not made by me):

https://www.youtube.com/watch?v=DhywwkMWH-E

There are several tutorials for creating walk paths in Poser, and walk cycles. I think that's the hard part. Once you have your figure moving like you want, it's fairly easy to add the clothing, then run the sim as normal.