Customization of BOM column data based on metadata

Hi all

I have a technical question.

I use a custom nomenclature, with metadata retrieval.

The metadata for my column is called ZVS_Bennenung2 (Basically, heading 2).

I would like this column to be filled for each row for items with metadata value SITE = LIBRARY and for this column to be left blank for all metadata values SITE LIBRARY

Is there a way to automate this?

On the image the problem is clearer: I want all the cells "for vacuum casting cell" to be automatically empty.

Anyone have an idea?

Thanks in advance