Won't work.  Either you apply a pose and the figure stays where it is, or you apply a pose and have it move to a location.  From standing to kneeling is two different locations in the Y Axis.  But Saving the Y also saves the X and Z.  Once you apply the pose you will have to move the figure to where you want it.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13, 14