Alias filter

To be able to filter Alias commands by user/rank so to limit who can use the command alias.

edit
might be good if could do permissions at the grouping level. Also thinking might be useful for custom commands to have groups and then permissions at the group level.

You can already create permission based on rank / level / username

I would like to be able to potentially assign alert commands to specific user for a time, without having to make tons permission groups.

Alias groups are nice but would be better if they could be the control level for the permissions. Same if custom commands could be put in groups and the permissions for those commands based on that group. Instead of having to individually apply them to each alias/command.