Something

      <Host name="www.server.com"
       unpackWARs="true" autoDeploy="true"
       xmlValidation="false" xmlNamespaceAware="false">
        <Alias>server.com</Alias>
        <Alias>ip1</Alias>
        <Alias>ip2</Alias>
        <Alias>ip3</Alias>
        <Context path="" debug="5" docBase="webapps/server"/>
        <Context path="/zivaguide_tools" docBase="webapps/server_tools"/>
        <Context path="/cms" docBase="webapps/cms"/>
        <!-- Context path="/ama" docBase="webapps/ama"/ -->
        <Context path="/awstats" docBase="webapps/awstats"/>

        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs/www_anotherserver_com"  prefix="www_anotherserver_com_access." suffix=".log"
                 pattern="combined" fileDateFormat="dd-MM-yy" resolveHosts="false"/>

        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs/www_server_com"  prefix="www_server_com_access." suffix=".log"
                 pattern="combined" fileDateFormat="dd-MM-yy" resolveHosts="false"/>

      </Host>