set authorization on additional data value

Hi All,

   i am new to SAP DMS. i need to classify my documents by a field in additional data to avoid creating several document types.

  I know in standard system, authorization can be set on: document type, authorization group and document status. foe mentioned reason, I need to know whether it is possible to set authorization on additional data value (by user exit or something). For example in following document:

Is it possible to set authorization for Value “A0”? Means if value of “form size” is equal to “A0” only special group of ppl can open the doc.

Regards,

Nava