Are you planned Application Dependency Mapping and End User Experience Monitoring implementation at some future point for NetXMS?
These are a couple of interesting references for it:
http://www.itsmwatch.com/article.php/3718406
http://www.wearebsm.com/managed_objects/2008/08/end-user-monitoring-experience.html

And this is an interesting exposition about The Four Dimensions of Application Performance Monitoring:
http://www.tidalsoftware.com/downloads/files/www.tidalsoftware.com/downloads/intersperselaunch/player.html

Best regards.