Enterprise Mac Security: Mac OS X Snow Leopard

5.4. Reviewing User-Specific Logs

Many user-specific operating-system components and third-party applications, such as Carbon Copy Cloner, ClamXav, and Yasu, log data into files inside each user's home directory. These logs are stored in the ~/Library/Logs folder. Because they are kept inside each user's folder, the logs are accessible only to that user (or anyone who has access to the account). This is good for the privacy of each user, but it can make troubleshooting difficult. Keep in mind that logs stored in a user's home directory are owned by that account, and could easily be modified by a proficient user. Any information gleaned from these logs should be taken with a grain of salt.

NOTE

You can get around the multiuser issues with logs. ...