How to link Part family instance with expression?

Dear Members,

I am looking for the option to link the Part-family member with an expression dynamically. Please share if there is any option to achieve it.

For example:

The part family table contains the unique entry as “Item” number. And the assembly where the member called has expression to locate. Then we can use it to filter out exact member by applying criteria.

The problem is this expression doesn’t remain associative to criteria condition or at least I am aware.

Please refer attached image for more understanding.

Thanks in advance.

NX 11 native mode