Metasploit Pivoting + Ettercap

Hello my friends, i'm KaOs and is my first post in here.

First of all sorry for my poor english. :)

Tonight i was trying to use Metasploit pivoting outside the console using the module "auxiliary/server/socks4a". No problem using it thru proxychains for scanning the "victim" subnet with nmap, but after this i was trying to check if i could use the route created by msfconsole for arp poisoning and spoofing the subnet with Ettercap, but didn't found any way to accomplish this, Ettercap keep finding only MY subnet hosts. Is impossible to do what i wanna do or there is some way?

Thanks in advance guys ;)