Mandanten condition for Array

Hi All

Trying to segregate data using the company field.

On Incidents, Interactions, Problems the company field is a standard VARCHAR field, on Changes the company field is a Character array. 

How can I write the mandanten condition to allow this to work as expected?

on Incidents the mandanten condition is:-  not ( isin $ and this works as we require.

Im struggling for the syntax to get this working on Changes.

Can anyone help?