Display ID or location in webpage URL or RSS Feed?

I’d like to use only one layout on different clients but show localised information on each of them. For example a time schedule for different stores. The schedules for all stores are in a database on our webserver.
Is there a possibility to add a parameter to the url when opening a webpage in a region to identify the client? Or use longitude and latitude of the client?
e.g. http://www.mydomain.com/information.php?display=[id]

And: Is this possible in the url of the rss-feeds in the ticker module?

Hi…someone found a trick to group RSS feeds by monitors id?