How to create Group Aliases

[Matthew S-H]

Is there any way to create a group that is an alias to another group?
For example:
lets say I created the group "wheel2" as an alias to "wheel".
and lets also say that the file /foo/bar exists and that i change its  
group to "wheel2"

so, when I run "ls -l /foo/bar", I want to see the following:
-rwxrw-r--   1 some_user  wheel2  140 Jan 1  3000 foo

on the other hand, if a progam (other than ls and find) is accessing  
this file, I want it to think it has the group "wheel".  In other  
words, I want to be able to tag files and directories using group names.


~Matt
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