Unfortunately intersect only works for 2D polyshape objects, whereas for 3D you can use alphaShape and then a numerical solution involving testing most of the surface points with inShape.
Depending on the simplicity of your shapes, there are also analytical solutions, for example either by computing the intersection between the planes of the polygons (see for example fileexchange planes-intersection) and checking if the line is within both areas, or with fileexchange SurfaceIntersection.
