No, CoConstruct only allows one team member to edit the Draft Schedule at a time to prevent you from overwriting each other’s changes.
If you plan to be working on updating multiple changes in the schedule, it's recommended to select the "Save Draft & Keep Editing" option after your first change. This will push the schedule to Draft mode and lock out any other users.
If you try to access a Draft Schedule that is currently being edited by another member of your team, you will be alerted and unable to open the Draft Schedule.