[vox-tech] specify umask for a folder?

[Jonathan Stickel]

I would like to share a group of folders and files with someone else. 
Our default group is the same.  If we both set our umask (e.g. in 
~/.bashrc) to 002, then any file either of us creates can be modified or 
deleted by the other, or anyone else in our default group.  This is the 
behavior I want.  However this applies to all files we create anywhere 
in the local filesystem(s).  Is there a way to set umask locally to a 
folder and it's subfolders?

Thanks,
Jonathan