Select points in a specific face of a polysurface

Hello, I’m struggling with my model.

I created a polysurface and I used “populate geometry” to create a bunch of points in the geometry, anyways I want to select the points in that specific face of the polysorface but I don’t know how to do it.
I need to create lines with all the points generated in the “populate geometry” I know that I can use “brep closest point” and then use the normal vectors, but the ones in that specific face I need to give them an specific orientation in the Z axis.

I hope somebody can help me
Select points in an specific face.gh (22.0 KB)


Select points in an specific face_2024Apr15a.gh (23.5 KB)

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thank you so much