Solid slice verticaly by polygons

Hi, I have no idea how to slice solid verticaly by polygons so I can have many solids. Do you have any idea?

Turn the Curves from your PolyCurve into Planes or surfaces in the Z direction. Use those to slice the Solid.

Edit:
Or you can do it as 2 solids:

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Thank you @Bjorn_Keulemans1, Geometry.Intersect is solution for me.