You may want to set domain redirections for your local network running NxRelay. To set domain redirections, create /nxrelay/conf/redirection.txt file and add domain to IP map like below,
Code:
router.mynet.local 192.168.0.1 printer.mynet.local 192.168.0.10 *.myorg.local 192.168.0.12 wpad 192.168.0.20 wpad.mynet.local 192.168.0.1