<screen>
    alias    = screen1
    maxlevel = warning
    minlevel = emerg
    priority = 2
    message_layout = %T [%L] screen1 %m
</screen>

<screen>
    alias    = screen3
    maxlevel = warning
    minlevel = emerg
    priority = 1
    message_layout = %T [%L] screen3 %m
</screen>