To get the files committed to a TAG by a particular user

We have a new requirement to get the files committed to a TAG by a
particular user
please
ex:--
cvstagdiff cvsRoot=":pserver:sibsankar:sahoo@newcvs:/EP2"
                            destfile="${version.no}/${mod.name}_${version.no
}.xml"
                            package="${mod.name}"
                            startTag="${from.tag}"
                            endTag="${to.tag}"
the above command is getting all the files committed by all the users to
that tag
but our new requirement is to get the files committed to the tag by a
particular user

Please help me in this regard

Jagadeesh Y
(CVS Build manager IDC)