Find user-name in log-files

I have lost some files. I looked into my .owncloudsync.log file and find the INST_REMOVE for the missed files. There is also a date.
But I can not find the user name.

When using the ownCloud GUI Client I always see which user modified, created or deleted a file.

Where does this information comes from? Can I find it somewhere in the log file?
There are some numbers for each entry in the log file. Maybe this are user identifiers?

No, no user name:

# timestamp | duration | file | instruction | dir | modtime | etag | size | fileId | status | errorString | http result code | other size | other modtime | other etag | other fileId | other instruction

Activity app on the server should give some insights.

1 Like