Guesstimating what you are asking, you need to loop over each $host

# Command execution and export data to local file 
sub main { 
  my @hosts = get_host(); 
  print @hosts; 
  print "\n"; 
  for my $host (@hosts){
    print "For host $host...\n";
    my $logon = get_logon(); 
    print $logon . "\n"; 
    my $psswd = get_psswd(); 
    print $psswd . "\n"; 
    my @cmds = get_command(); 
    print @cmds; 
    my $output = qx(cmd); 
    open OUTPUT, '>>' , 'devbfs51chassisshow.txt' 
      or die " Couldn't open output.txt: $!\n"; 
    print $OUTPUT "1plink -ssh -pw $psswd -l $logon $host @cmds"; 
  }
  close OUTPUT;
}
[download]

See also: looping through array