Erika

If you are using "multi-select list boxes" the implication is that there is
a one-to-many relationship between the data/record represented by the rest
of  your form and the selections in (each of) the list boxes.

To get the best out of Access' relationally-oriented features/functions,
you'll need to store your data relationally.  If you really do have a couple
one-to-many relationships, you'll need at least one additional table per
list box.  The additional table(s) will hold the recordID of the form's
record and the recordID of (each) selection on the list box.  ?4 items
selected? ... 4 records in the new table.