But this time, how can the same multiple values be selected from 2 non-associated listboxes? Select in Field seems to only work for 1 selected value. If I select multiple, the trigger no longer works. Does something like Concat() need to be used?
For some reason when I select several values in the first listbox, only the excluded values are being selected in the 2nd listbox. I evaluated the expression that you provided and it returns "(NOT 27/6|4/7|11/7)". Is there a way to remove the NOT? It's only showing up when I select many values.