From your Manager Dashboard, locate the “Campaigns” box
Choose the campaign in which you would like to assign permissions, click on the “Actions” drop-down menu, and select “Edit Configuration.”
Select the "Permissions" from the top menu of tabs.
"Dialing Permissions" will allow you to set which users/groups of users will be allowed to dial contacts from the campaign.
"Appointment Recipients" will allow you to control which users/groups of users dialers may set calendar events for.