Hello,
don't know if the question as been submited but...
Actually the snippet look like this
<!-- #BeginSnippet name="SnippetName" users="user1, user2, user" lastsavedts="yyyy-mm-dd hh:mn:sc" lastsavedby="user" height="500" -->
in admin area, there is a section for group administration, to reduce the number of users that have de abilities to edit,
adding a group section can simplify the gestion and reduce the weight of the snippet line
(particulary whith a file that have more than one edition area)
Example:
group1 content : user1 user2 user3 user4
group2 content: user userA userB
group3 content: utilisateur userX userY
group4 content: xxx1 xxx2
<!-- #BeginSnippet name="SnippetName" group="group1, group2" users="utilisateur" lastsavedts="yyyy-mm-dd hh:mn:sc" lastsavedby="utilisateur" height="500" -->
<!-- #BeginSnippet name="SnippetName" users="user1, user2, user3, user4,user, userA, userB, utilisateur," lastsavedts="yyyy-mm-dd hh:mn:sc" lastsavedby="utilisateur" height="500" -->
sub-groups can be a good idea too,
groupA content: group1, group3, power_user
Sorry for my bad english, i'm just french

Pascal.