Capturing network traffic (rtmp) between VMs or using loopback in the same VM using wireshark

I need to to capture RTMP traffic between two virtual machines (server and client) or atleast have the server and client on the same machine and capture the traffic. I am able to capture the traffic if I run wireshark on the host rather than on the VMs. But I need to capture it on the VM to be able to manipulate it.