Filter traffic between Virtual Machine

Hi All,

I need your help to setup my Vmware environment. I have 2 Esxi 5 Servers running several virtual machine in the same Lan(192.168.1.0/24) and I would like to packet filter traffic between them. How can I accomplish this goal with Astaro?
I have 2 option:

use my external ASG 220 that connect the entire environment to Internet or configure an Astaro Virtual Machine.

I have looked around for a documentation without any luck.

Please Help!

Thank you.