Here it is explained how to apply Advanced List Filter in Content Builder on a Select List element when the "Multiple" checkbox is checked so that more options can be select at a time.

If Advanced List Filter is applied on a multi-select list and Filter is defined as follows, it will only search for records where only one value was selected, for example only value1.

value1

value2

value3

It will not show records that have both values value1 and value3 and as selected values, or value1 and value2.

 

To see all records that include a certain value of a multi-select list, possibly along with some other value, define the Filter as listed below:

@match/value1

@match/value2

@match/value3

 After defining the filter this way, all records including the value searched for will be shown.