Hi Shweta,
Please read the below thread:
http://scn.sap.com/thread/1945899
I can prefer you a workaround, Instead of further participant you can assign him as part appraiser. The Part appraiser can view the documents in "Inprocess" status. If you want him to view throughout the appraisal cycle you have to create an implicit enhancement in HRHAP_DOCUMENT_GET_LIST. If you need more information regarding code please revert back.
With Regards,
Giriesh M