[logback-user] Separate log within same application

I use logback in my application to log errors and, if necessary, warnings and info. It's set up and it works great. I'd like to have a separate log that keeps track of user activity within our admin tools. For example, say user x deleted some information using the admin tools, I'd like to log that. In some cases there might be both error logging and user behavior logging in the same class. I'm not clear on how you would separate the two, since I'm using the LoggerFactory with the class name: final static Logger logger = LoggerFactory.getLogger(UserDB.class); What would be the best way of doing this? TIA, John