Usage: channelgroupclientlist [cid={channelID}] [cldbid={clientDBID}] 
        [cgid={groupID}]

Displays all the client and/or channel IDs currently assigned to channel 
groups. All three parameters are optional so you're free to choose the most 
suitable combination for your requirements.

Example:
   channelgroupclientlist cid=2 cgid=9
   cid=2 cldbid=9 cgid=9|cid=2 cldbid=24 cgid=9|cid=2 cldbid=47 cgid=9
   error id=0 msg=ok