In Lightwave this is basically no problem but currently, I don´t know wich is the best way to export animated characters to blitz3d.
Lee made a LW>B3D converter that takes care of that! Your model needs to be boned and use UV maps... ie standard way to do animated characters. Here's a linky:
http://www.terabit.nildram.co.uk/lwconvert.zip
If you have questions, email Lee:
http://www.blitzbasic.com/Account/showuser.php?id=396
Lightwave Deforming Character Convertor & Lightwave Rigid Geometry Convertor
Version 2.11
Copyright Lee Page
TeraBit Software
2004
I *think* that this is the latest version... be sure to read the included readme.txt for instructions.