Voronoi curve trim with surface

Grasshopper
1

Hello,

I would like to remove all the voronoi segment which are outside the surfaces. Does someone could help me

Sans%20titre_2
Sans%20titre_21463×683 76.6 KB

2

Region intersection between voronoi cells and borders. For more help pls upload file with internalized geometry. (at least a sample)

3

I try on this way but I’m not arrive.
Sans%20titre

4

first of all, pls have a look at this link:

secondly, your areas have holes in them and this usually complicates things.
I don’t know if the following solution is the best, but it works:
voronoi.gh (19.8 KB)

voronoi
voronoi1656×733 264 KB