Tagging people in topics

This is mostly related to OOG-topics during job-related discussions. Occasionally a lot of comments will be posted in a discussion, meaning that certain questions to the leader or another team member get lost. Here, it would be ideal if you could tag people in topics, leaving them a notification that “x tagged you in a comment in the topic ‘y’”. This would make it easier to know when you’re required to answer a question or clarify a comment without having to scroll through several comments in the discussion.