organizing multiple email accounts

hello all,
i use outlook 2007 for my email accounts, 3 different accounts currently. and what i would like to do is somehow set it up so emails from each account are in a different color. what i normally do now is just right click on the email and hit the 'category' button and change the email to whichever color corresponds with the email account it was intended for. but i would like outlook to do this as they are coming in so i know before reading it. if this is possible in any way please let me know.

thanks