UMask - File Creation

Does anyone know of a way to make a change that when a user creates a directory or file that it will keep a custom usmask setting?

example, currently when a creates something on a network drive, external drive, or whichever you have 755 for directories and 644 for files (umask of 022). What I am trying to see if there is a setting to change that it will write a umask of 002.
( NTFS is excluded out of this conversation ).

We tried the environmental.plist, the /etc/.. nothing will make a change that will stick.