Someone

#Start User username1
<VirtualHost IP:80>
  ServerName username1.someserver
  ServerAlias www.username1.someserver
  DocumentRoot /var/www/username1/
   <Directory /var/www/username1>
     AllowOverride AuthConfig FileInfo Indexes Limit Options
   </Directory>
</VirtualHost>
#End User username1

#Start User username2
<VirtualHost IP:80>
  ServerName username2.someserver
  ServerAlias www.username2.someserver
  DocumentRoot /var/www/username2/
   <Directory /var/www/username2>
     AllowOverride AuthConfig FileInfo Indexes Limit Options
   </Directory>
</VirtualHost>
#End User username2

#Start User username3
<VirtualHost IP:80>
  ServerName username3.someserver
  ServerAlias www.username3.someserver
  DocumentRoot /var/www/username3/
   <Directory /var/www/username3>
     AllowOverride AuthConfig FileInfo Indexes Limit Options
   </Directory>
</VirtualHost>
#End User username3