With the methods that are available from
MetaDataProvider you can customize the Items, such as associating them with the username or an ID assigned to each user, and then control the flow to each of these items.
A simplified implementation of that can be found in the
[URL="http://www.lightstreamer.com/demo/MessengerDemo/"]Basic Instant Messenger Demo [/URL]and you can also refer to
these and
these other threads in the forum.