[JDEV] IQ packets and offline storage

[MFCOLLINS3 at sbcglobal.net]

I am building an application that I want to use Jabber 
with. My application needs to send customized messages 
to clients running on workstations around the network. 
I was thinking that the messages would be packaged as 
IQ requests. If a client is not presently online, I 
would like the message to be stored offline until the 
client comes back online.

I was looking through the code for mod_filter to try 
to understand the filtering functionality. I have two 
general questions:

1. Why does mod_filter not consider IQ packets for 
offline storage? Why should they be treated 
differently from message packets?

2. Is there another way that I can achieve this 
functionality without modifying the Jabber server code 
to achieve it?

Thanks,

Michael