It's possible than when i create a file in my home, the "nobody" user (webserver) have group permissions to this file by default ?

Is anoying if i need ask to support for change the group of the file all times.

greetings.

I don't think so, but you should be able to change the group only yourself since you created the file.why do you want to use group permissions anyway? I didn't think that they had any consequence on the Web server