How to notify more than one person in a comment? It would be really handy if we could notify more than one person in a comment. Many times it is needed that 2 or 3 persons be named but, as that is not possibility, I have to repeat the comment.
As Richard has commented, you can't explicitly reference more than one person in a comment.
However, the person whose post you are commenting on always gets notified, so if they are one of the intended recipients, that's good. Just include another intended recipient too.
The reason for this restriction is that comments are not for discussion. They are simply notifications or requests for clarification. There should never be any need for more than one person to be notified of a comment; and certainly no need for more than one person in addition to the poster to be notified.
If you ever feel that the existing @-notification mechanism is insufficient, you're doing it wrong. Include the poster and perhaps the most useful other recipient (if there is one) and leave it at that.
Sometimes I find myself having to repeat a comment to more than one user. Of course, the post's owner is notified, but since my comment is towards two users, I'd follow the following style.
[Here's my comment to the OP.]
@User1 [Here's my comment to user1]
(cc: @User2) Please see [my comment above].
Comments are not for discussion, but it is sometimes found necessary to communicate something with two users usually other than the OP.