I'm going to describe more precisaly what is my purpose and what I need:

About my final project: 

On one physical machine, I use 4 virtual machines, which are : one with kamailio 3.2.3, asterisk 1.6.13, odbc and Siremis 3.2

An other one is a first client in an other virtual subnet as kamailio.. which reprisents the "public network" ! 

The two others virtual machines are in the same subnet as Kamailio which represent the "private network"

( like a company and the public network)

So, everything in the private network works well, with TLS, Siremis and asterisk, perfect communication!

I still need to make the route between the two subnet but this shoud be easy and

what I need precisly is to make a filter on SDP media managed by Siremis like:

This is why I need to use the sdpops module of Kamailio, of course.

I need to make the possibilities in Siremis to set things like : this subnet or this address -> remove this media like application, video , only audio can be allow !

This is the filter I need to make it work. Of course in Siremis because , I m simulating calls from public network and into the private network of a company . 

And it as to be user friendly, not spacially for a computer scientist. This is why, I need to make this simple filter on the media of sdp, and user friendly in Siremis.