You could set up [custom logs][1] in your `httpd-vhosts.conf` depending on the `HTTP_HOST` variable – if your server is an Apache and you use subdomains for each single site. For sub directories: SetEnvIf Request_URI ^sitename1 sitename1 SetEnvIf Request_URI ^sitename2 sitename2 CustomLog sitename1.log common env=sitename1 CustomLog sitename1.log common env=sitename2 _not tested_ [1]: http://httpd.apache.org/docs/current/mod/mod_log_config.html#customlog