Zoom Chat

Hey, @Lori4,

I assume you mean Meeting Chat.  Unfortunately, there's no way to limit chats by the host to just Hosts and Co-Hosts.  This is the case even with Chat settings set to "Participant can chat with No One":

As you can see here, the message is visible from me to the Co-Host and both Attendees:

In the past when I've wanted "special communication channels", I've used a private Discord channel open only to the selected folks that need to communicate.  It complicates things a little -- especially for Discord newbies -- but most of the people I produce for that need this level of special communication are technical enough and nimble enough on their computer to be able to do this.

Not sure what the use case is -- are you trying just to not bother the participants, or is there "confidential communication" that you don't want them to have access to?

You can private message each other in a meeting chat if enabled. This may not be exactly what you want though?

Send a private message

If the host has enabled private chat, participants can communicate with each other privately in the meeting. Hosts can't see private chats between participants. 

1. While in a meeting, click Chat 
    

    

    in the meeting controls.
2. In the To: drop-down menu, select the participant you want to chat with directly.
3. Enter your message in the chat window.
4. Press Enter to send your private message.
   Your message will appear in the chat window indicated by a (Direct Message) notification above the message.

https://support.zoom.us/hc/en-us/articles/203650445-Chatting-in-a-Zoom-meeting