We have enabled a service called superchown. This service allows you as a volume owner to change the ownership of files in the volume. Previously, you would need to send an email to make these changes, but with superchown you can do it yourself.
Currently this is implemented as a command line utility that is available on the LILOs. Its manual page has all the details:
man superchown
If you have further questions, or want to use superchown, please send us an email.