Shared Options / Combinations

We have 2 storefronts.

Products from 1 are shared to 2nd. Some products have Product Options in store 1. For example size: L, XL, XXL, etc.

Now the same product must not show 1 of the product options variants in the 2nd store. i.e. XL.

How to do that in shared products? I mean to hid a 1 product option but not the Option group?