This is done from the filter field. If you know the name of the column, you can add a filter extracting the value you add to this in the filter.
If searching for documents with a specific status, use: ST<9 or ST:4
If searching for items / lines - with a specific status use: ST1>9 or ST1:4
In some case the field name on a report is an alias, and cannot be used in the filter.
On suppliers and customer accounts we have a classification field: Supplier classification & Customer classification. To filter on this field in reports or applications, you would use:ACCOUNTCL.
If you need assistance to find the correct field name, contact the RamBase Support Team who will help find the correct filter.