Yes, a task has an option for e-mail notification. But I want to notify a specific person about a specific task result.
Typically a project has tons of tasks, like printing PDFs, sending files, etc. And typically the user list for a project contains many person which are mostly designers who are responsible for such massive tasks. They all get notifications about tasks if that option is activated for tasks.
Let's say I have a specific task, i.e. "clash report" which result I want to send to a project manager. Currently I need to include the PM to users list.