Multi-select List Boxes in Search Forms

Multi-select behavior is now available for listbox fields in Search forms. During field configuration of a listbox, enable Allow multi-select:
Multi-Select Listbox in Search example

Select "Match any" when all records containing any of the selected value should be returned.
Select "Match all" when all selected values must be present in the record for it to be returned.

Here's an example of the deployed DataPage:
Multi-select Listboxes in Search Forms example