Question about ACL and data privacy

[CEA-SEPIA]

In our solution we have a private chat. This private chat has to be
confidential but also has to send the data to UCengine.

So I'll use the event for the handling of the message beetween the
users. But, like I said, it has to be confidential and so I want
several event that will not be broadcasted to the entire meeting.

Does the ACL allow to control the recipient of the event in a meeting
by user ?

To illustrate:
John, Jack and Thierry are on a meeting.
John OPEN A PRIVATE CHAT WITH Jack
John SAY TO Jack: "hello world"
If wireshark running on Thierry computer, Thierry will see the event
concerning the message "Hello world" beetween John and Jack ?

[CEA-SEPIA]

For record:

Following the last meeting with UCengine team. It seems that a new
optional encoded parameters 'to' will be add on events.

Thats resolve my problematic.

[CEA-SEPIA]

Is there some avancement on this feature ?

If you want to send a private event to several user, it will be great
if the 'to' field would be an array to limit bandwitch usage of the
server.

Thanks for the news.