Sent and received messages in same mailbox

Hi,

I'd like to set up a mailbox that collects messages that are sent from me and received by me for a specific project. When I set this up with a standard (using rules) or smart folder, sent and received messages look identical. I can of course add a "To" column to the mailbox but this is then also present in my inbox which list me under the column for every message. Not ideal

Is there a way to differentiate sent and received messages in a mailbox by changing one set to italics or colour coding or something?