Use Particular Velocity only in XY Space

Hey There
I'm stuck with my Particular skills.. I want to attract particles to a layer (Physics Model -> Bounce -> Collision Event -> Stick) and they only react to a "normal" layer.
I want to mask a girl. She should attract these particles and they have to stick around her immaginary energy field.

because of the movement in XYZ space, the particels need a 3D object to stick around. I know I could turn my layer 90° but that does not works with my girl masked.

There are two options:

1. Can I let the particles move in a XY space (without Z) and they'll stick around a normal layer?

2. Can I let them react to an extruded shape layer (Renderer: Ray-traced 3D)?

Does anyone have a solution?

-Manu

Hmm okay

I'm trying to do this:

Points should look like they are attacking the girl in the middle from the outside to the inside. The girl has an immaginary energie field around her, so the points will stick in this around her.
After this she'll "smash" the points back into their grid with a move.

Attack:


Smash back: