Tasks are found under the "More" section on the colwiz navigation menu on the left.

 

1. In the  Tasks window, find and select the Task to which you want to add followers.

2. In the right panel, you can see and edit the Task settings. In the textbox below ‘Followed by’, type in the names of the Contacts whom you want to follow the Task. As you type, they should be automatically found for you to select.