Hi Steven Gu,
Unfortunately, No.
The only methods allowed on the Authentication scheme using PERL API is discussed here :
CLI Authentication Scheme Methods - CA Single Sign-On - 12.52 SP1 - CA Technologies Documentation
You can also find the same list in PolicyMgtAPI.pod file located at <PolicyServer_Install_Dir>/CLI/site/lib/Netegrity folder. (sample attached)
=head2 PolicyMgtAuthScheme Methods
=over 4
=item *
L<CustomLib>
=item *
L<CustomParam>
=item *
L<CustomSecret>
=item *
L<Description|"descriptionauthscheme">
=item *
L<IgnorePwd>
=item *
L<IsRadius>
=item *
L<IsTemplate>
=item *
L<IsUsedByAdmin>
=item *
L<Name|"nameauthscheme">
=item *
L<ProtectionLevel>
=item *
L<Save|"saveauthscheme">
=item *
L<SaveCredentials>
=item *
L<Type>