You should consider having some McAfee DLP professional services time to answer and assist you with all these stuff =)
isn't that's what this community for?
even some answers would be appriciated....
k, this is how I got mine working.
Creating a content based tag for the string of words you are trying to prevent. This is under Application based tagging rule(text patterns).
Then create a Clipboard protection rule and use the Tag that you created. Assign rights and there you go.
Not sure if this works both ways as DLP is not really designed to protect data from getting in, Its more for data going out.
Hope this helps