wolfwood
If your geometry is just points or curves you can use either the Point or Curve Engine Procedural to do this without eating up a license, basically allowing you to run a SOP network on geometry.
Houdini's Fur system uses this approach actually if you want a robust example.
A simple example is attached. Just render a few different frames to see the geo move.
This setup doesn't seem to work with velocity motion blur. The sop chain seems to work fine with velocity MB but when run as point generation procedural I get a warning that mantra can't find a velocity attribute.