How to dinamically change constraint of a cloth?

I have a cloth which is free to move and a capsule collider.

When the capsule hits the cloth I'd like that this one sticks on the collider only in the points that are touched, while the rest remains free to move.

I think i can check on the distance between the cloth's particles and the collider and change the Maxdistance accordingly, but I'm not sure on how to access these objects.

Thanks in advance