filter f_spacecommand {
    level(info..emerg);
    match("SpaceCommand:" value("MESSAGE"));
};

rewrite r_rewrite_spacecommand {
    subst("SpaceCommand:", "");
};

destination d_spacecommand { file("/var/log/space_operation.log"); };
log { source(src); filter(f_spacecommand); rewrite(r_rewrite_spacecommand); destination(d_spacecommand); };