Use the join table to list your projects on the contacts layout and your contacts on the projects layout. You can include fields from the contacts table in this portal on projects and vice versa on the contacts layout. Then, your conditional formatting should evaluate correctly to highlight the project manager or the manager's projects.
I tried the above but I could not get it to work.
I am away at a sales meeting for a few days but will look at it again towards the end of next week.
I did not want to dissapear with out saying thanks for the support.
"Could not get it to work" doesn't really help me to help you. When you get back to it, describe exactly what you did and exactly what results you got and I should be able to steer you from there.
Sorry Phil, I just meant that I had not given it a good try and wouldn't get chance for a few days but I did not want to be rude and not respond to you original message.