Tracking Unique User access to an URL

Hi There,

I am considering using PIWIK to track the unique user page views for different URL, e.g. if I have URL in my site and a partner is sharing this URL on his or her sites, I would like to know how effective his or her campaign on bringing unique users to my web site.

The tricky thing is to detect that the same device is access the same URL twice (or more times) and solely one access is counted.

Can I achieve this using PIWI?

Thanks in advance,