I'm playing around with mojoPortal for the first time and I'm looking for a forum feature and I'm not having any luck.  The idea is when someone posts a link to, for example, a product on Amazon, I want to embed my affiliate code in the link.  If a user embeds their affiliate code, the system would swap it for mine as my site would not allow user affiliate codes as it would be a primary source of income.  

Thank you for any assistance in advance.

Chris