Shekhar, just to clarify...
Are you saying that iPads can normally access Captivate files launched from a network server? To my knowledge this would only be true if the iPad in question was able to log into the network and browse the LAN via Safari.
On the other hand, if you are talking about a corporate intranet web server, then the iPad would still need to be logged in (probably via wireless) and authenticated in most cases.
The corporate LMS will likely be a web server, but these are also usually on a secured intranet.