Filter on multi valued attributes

Hello everyone,
As part of our implementation, we are using a IdentityAttribute Rule for checking uniqueness of an attribute and the rule is later mapped to a transform on identity profile. We are using below IdnUtil wrapper class:
public int countIdentitiesBySearchableIdentityAttribute(String attributeName, String operation, String value)
We have a new use case where the attribute we want to search/filter against is multi valued (list) i.e., the first input parameter for the method would be a list. Does this method work for multi valued attribute as well?

Hi, were you able to implement it?