If the Virtual Machine's Network is configured as NAT switch it to Bridged otherwise need to see the full output of ifconfig on the Host(s) and ipconfig /all on the Guest(s).
On the Host(s) in a Terminal... (/Accessories/Utilities/)
Copy & paste the following commands, as is, and press Enter...
ifconfig > ~/Desktop/host_ifconfig.txt
This will create a file on the Host's Desktop named host_ifconfig.txt
On the Guest(s) in a in a Command Prompt... (Start > All Programs > Accessories > Command Prompt)
ipconfig /all > "%USERPROFILE%\Desktop\guest_ipconfig.txt"
This will create a file on the Guest's Desktop named guest_ipconfig.txt
Change the file name appropriately to reflect Host1/Guest1 and Host2/Guest2 and then archive (compress) the files unedited and attach to a reply post.
Note: DO NOT copy and paste, dumping the full output of these command into the body of a reply, rather redirect the output of these commands to a file as shown and then archive and attach the files in a single .zip archive file to a reply post.