Quote - > Quote - The way I understand it Luxrender keeps working till you tell it to stop.

Correct.

Quote - You can’t make movies that way.

Sure you can. Look at the haltspp and halttime parameters in the film section.  You can stop a render after reaching a certain number of (average) samples per pixel, or you can stop after a specified amount of real time has elapsed.

Now, how you get an animation out of Poser and into Luxrender is something I'd like to know...

Thanks for your answer. I noticed there is no mention of animation in the “reality” plug in for Daz Studio. It doesn’t seem that difficult, when I think about it rendering out a movie is like batch rendering, when a program is finished one job it automatically moves on to the next.  A few lines of code and presto you have a movie rendering engine :). I"ll bet you guys will make it happen next year.
Steve