Show usergroup name in emails?

[kpmedia]

In one of the email templates (in languages), the following variables are available:

$bbuserinfo[username]
$vboptions[bburl]/showthread.php?t=$threadinfo[threadid]
$threadinfo[prefix_plain]$threadinfo[title]
$post[message]

I want to show not just the username, but the usergroup, too. This way, for example, a person receiving the email will know right away if the posted reply was from a moderator, admin, or a specific member group -- without having to go to the forum first.

But what's the variable to add this?

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