I would looooove to have a direct xml exporter for Poser..then you just export scene in xml format open Lux and open the xml file for rendering...as of now you have to export obj's, gather maps, import into Blender, fidget with the surface shaders, convert materials in luxblend and render, it works but takes a long long time.

Daz studio to blender to lux render work flow examples.
the only difference between Daz and poser is that daz gathers the Maps for you.

http://www.renderosity.com/mod/gallery/index.php?image_id=2097031&user_id=192060&member&np

http://www.renderosity.com/mod/gallery/index.php?image_id=2093278&user_id=192060&member&np