Viewing other users' jobs is permission based. 

In the Web Portal, a user (with the permissions) can see all users and their jobs through the Jobs list or the scheduler. (Please note: Field Agent user types will not be able to access the Web Portal)

In the App, in the diary, a user can view other users' jobs (if they have the permissions) by selecting the three people icon in the top right of the screen to bring up a list of Users, and can then select the checkboxes for the users whose jobs they want to view.