# app.pl
use Log::Any '$log';
use Log::Any::Adapter;
Log::Any::Adapter->set('Log4perl', some=>'param', ...);
# ...
if ($some_debugging_flag) {
    # additionally log to a remote socket
    Log::Any::Adapter->set(
        {lexically => \my $lex},
         'CallBack', 
        logging_cb => sub {
             my ($method, $self, $format, @params) = @_;
             $socket->print($format, "\r\n");
        }
    );
    some_func_which_logs();
} else {
    # no additional adapter
    some_func_which_logs();
}
# back to normal, logging to Log4perl only ...