How can i enable different roundcube login window for differnet domain

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Hai,
I have installed iredmail 0.8.7. on centos 6.7.Now my roundcubemail path is /var/www/roundcubemail.
I have more then one domains (abc.xyz.in,.,abc.xyz.org,..abc.bz.in etc).I need different roundcubemail login screen for different domains.
Please help me if it possible...