Can we add a suffix to a domain?

[naeemirza]

Can we put a suffix to a domain using pfsense firewall and or DNS system to track traffic sent to a specifc website from the network?

Example:

http://www.website.com/

when a user accesses this website through pfsense; an automatic suffix should be added at the end of domain.

http://www.website.com/?Campaign

whereas " ?Campaign" is suffix for traffic tracking in google analytics.

This way browsing on user's end wouldn't be disturbed whereas the webmaster will know that this traffic is referred from a specific campaign.

Thanks in advance.