Hi,
I'm not sure what you mean with "by passing parameters", what would you like to do?
regarding having each user receiving different data you can check the following threads:
http://www.lightstreamer.com/vb/showthread.php?t=908
http://www.lightstreamer.com/vb/showthread.php?t=61
http://www.lightstreamer.com/vb/showthread.php?t=890
HTH