Quote - vex, if lash not already a group on poser figure's head, it can be made a group using group editor.
create new group, rename new group, add material (e.g. upper or lower lash).
then mag zone for head can be restricted to lash group, whence mag will only affect said group.
unfortunately it tends to move the lash around a bit.

Its not adding a new bodypart when I do this. I can't even make the eyelash part red on V4 in the group editor.

Guess its a bust for V4 :/