Another way to set the orientation of the translations is to interpose a ghost actor (an actor with no geometry) between the part of interest and its normal parent. The orientation of the translation will depend on the rotations of the parent, so rotating the ghost will determine the direction in which its child part moves.

In the attached cr2, the ghost part "B" has been zRotated by 25 degrees, and the child part "C" has been zRotated by -25 degrees to return it to its normal position. Both B and C were then Memorized. The result is that when C is translated, it will move at 25 degrees to the horizontal.

Normally after setting up the ghost actor at the correct rotation, you would hide it from the Poser menus thus:

    hidden        1
    addToMenu    0

In the attached file I have not hidden the ghost, so that you can play around with it.

I think the ghost actor method is particularly good if you need to change the orientation of all three axes.