Be able to assign trades on a specific job to a specific user. Ex. job A, trades 1-5 user A, trades 6-10 user B, and so on. And then allow user A to send notices/invites etc. on behalf of other users based on assigned trades. This would also open up an opportunity for a "MyTrades" button that allows quick tracking of user A's trades on current multiple jobs that he/she is responsible for.