Gave it a try (v6), it works like a charm.
I exported a V4 (with an advanced Poser material), wearing hair and a simple bathing suit; Of course I had to remove/replace the nodes the exporter doesn't understand (strangely enough, only Glossy and Noise were not recognized; Math nodes, Anisotropic, Blinn and some others went through).

While importing into Lux, the log gave me some errors, but started rendering nevertheless. I thought you might be interested in those errors:

<em>[2010-08-18 17:54:15 Info: 0] Loading FreeImage Texture:
'F:PoserRuntimeTextures...texture.jpg'...<br></br></em>(-snip lots of
those-)<em><br></br><br></br>
[2010-08-18 17:54:20 Error: 41] Couldn't find float texture named
'Color_Mul_65'<br></br>
[2010-08-18 17:54:20 Error: 41] Couldn't find float texture named
'Color_Mul_65'<br></br></em>(-snip lots of loading-)<em><br></br><br></br>
[2010-08-18 17:54:41 Debug: 0] Compiled scene size:
106755KBytes<br></br>
[2010-08-18 17:54:41 Debug: 0] Mesh: accel = none (global),
triangles = 1324 wald, quads = 0 quadrilateral<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Debug: 0] Mesh: accel = none (global),
triangles = 7440 wald, quads = 0 quadrilateral<br></br>
[2010-08-18 17:54:41 Debug: 0] Mesh: accel = none (global),
triangles = 12188 wald, quads = 0 quadrilateral<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals<br></br>
[2010-08-18 17:54:41 Warning: 43] Inconsistent shading
normals<br></br></em>(-snip lots of that-)

Vaguely related question: Only one (of two) lights imported, and it's apparently situated behind my figure, so she's actually a black silhouette...
Is this a fatality so far, or is there a way to move that light so I can see anything?... I think I recall having seen people getting a "normally" lighted scene.