Not in a single step. Do the sillouettes have to move (ie: change shape) or are they more like mannequins?
There’s a script you can add to Blender called MakeHuman (I don’t think it comes with the distro, someone check me on this one) that should produce figures easily adequate for shadows.
Have you considered shooting live actors against a green or blue background then processing the colours to produce the sillouettes ?
Yup. I think that that would be the best method. Looks like I was shunning some hard graft by fortuitously discovering a figure animation routine within blender or as a plugin / sample. Thanks for all your help.