Tags in the Above Store Console allow you to more easily filter tasks, library files, and more. You must first create tags to use throughout the ASC, and then assign those tags where needed.
You must first create tags, and associate them with specific stores before proceeding. You can learn how to do that HERE.
In the task list, click the three-dot icon within a task to associate that task with a specific tag. Simply define the needed locations using rule drop-down menus and check boxes. Only locations fitting the parameters of the rule you created will show the task within that its task list. This makes it easy to have fewer task lists, and still have customizations for the locations that need them.
(This will prompt you to log into HotSchedules, and then guide you through the process click by click.)