Under User Management section you can change Settings on per-user basis. Settings follow the same convention as ISL Conference Proxy settings, however settings specified on per-user basis will overrule global and domain settings.
Note: Settings in ISL Conference Proxy are organized hierarchically, meaning that settings appear globally, per-domain and on per-user basis. More specific settings will overrule more general setting, thus per-user settings will overrule the per-domain settings and those in turn will overrule global settings.