I've found inside the documentation that it´s possible to use SSLv3 and TLS to allow the criptography in the transport session, do you know if is possible to apply criptography inside the volume or files ?

Celerra does not natively apply encryption within its filesystems or volumes.

Windows File Server can enable the file name extension restriction, so a user can not copy and paste a .mp3 or .avi file inside the file server, is there something like this on celerra ?

Yes.  Please see the Celerra document called "EMC Celerra File Extension Filtering".

Windows File Server can use the quota manager to manager how much information a user can store in his folder. With celerra there's some something like this?

Yes.  Please see the Celerra doucment entitled "Using Quotas on EMC Celerra".

You can download the complete documentation set from Powerlink.  Navigate to the following location:

Home > Support > Technical Documentation and Advisories > Hardware / Platforms Documentaion > Celerra Network Server > General Reference

The documentation set is about the third choice down and is called "Celerra Network Server Documentation CD".