Assign Custom Email Templates/notifications to specific projects or tasks

[#1]

We wanted to use the same concept of the automatic email notification that a user receives once a task or project has been completed. But in our case we wanted to create a new custom email and notification that is tied to a specific numbers of projects (Not system-wide) in order to include a link to a survey to collect feedback form our users. Currently, there isn't a way for us to implement this to a portion of projects or tasks and instead would result in our survey being sent out system-wide for all projects/task completions.