redirecting rtmp requests to different websites based on host name

[vtapas]

I am looking for a layer 7 firewall.I have to redirect rtmp requests for different hostnames coming at a gateway to internal servers at LAN at their respective hostnames.
If some one has some idea let me know can this be done on IPTABLES
via

IPTABLES incoming at port 1935 -protocol rtmp -hostname1 to server 1 on LAN @ port 1935
IPTABLES incoming at port 1935 -protocol rtmp -hostname2 to server 2 on LAN @ port 1935

like that.
Or if not IPTABLES then some other feasible solution.