Search for - value (of field of type list) in list

thanks; but I do not see where I should do this as the only options I have in the constraint block are "contains, does not contain, is empty, is not empty ".
I have the impression there is no built-in feature available to do it simply with bubble, the only way is to run a custom js script looping through each seeker, doing the check “skills :intersect with skills input’s value :count > 0”.
And if I was to do that, I would prefer doing it server side, but using toolbox for server scripts, I am facing another issue which I have written here: Advanced search for- included models