I'm not sure I understand your question, but you could concatenate them all into one string, like this:

   my $arg1 = "204.120.69.195";
   my $arg2 = "-";
   my $arg3 = "-";
   my $arg4 = "GET";
   my $single_arg = $arg1 . $arg2 . $arg3 . $arg4;
   ### $single_arg now equals "204.120.69.195--GET";
   my $rc = system("your_perl_script.pl", $single_arg);
[download]

and then execute the script passing the new contatenated single argument to the script.

HTH.