How to shop only certain fields to others?

Hi

I am truly sorry if this is covered somewhere but I cant seem to find it...
This is what I am trying to do...
I have multiple reps who are awarded a lead to work on based on who gets the lead logged first.
Once logged, the other reps must be able to see who the lead is and who owns the lead, but without any further info like numbers etc. As admin I should be able to see everything.

How can I do it?

Thanks