encoding fields for m4a

For m4a:
| | Encoded By | ©enc | UTF-8 string | Person/company who encoded the file | encodedBy

For mp3:
| | ENCODEDBY | TENC | Person/company who encoded the file | encodedBy

In iTunes, these fields are read and displayed as "Encoded With".

Is it possible to support these fields?

Thanks,
Rajanna