philbish - 3:29 am on May 13, 2012 (gmt 0)
Yes you'd still need to use a WAN ip address:
Your remote web server application could invoke a http request to your wan ip, also running a web server
Could have a simple printme.php on your local web server, lamp stack, apache, whatever:
Then that printme.php could send the data to a printer as specified in the query string.
If I can clarify anything just let me know happy to help