I guess you want to build a Hash of Arrays (HoA)

#!/usr/bin/perl
use strict;
use Data::Dumper;

my $infile = 'text.txt';
open IN,'<',$infile 
     or die "Could not open $infile : $!";
my $name;
my %hash = ();

while (<IN>){
  s/^\s+|\s+$//g; # trim leading/trailing spaces
  my ($col1,$col2) = split /\s+/,$_,2;
  if ($col1 eq 'name'){
    $name = $col2;
  } elsif ($col1 eq 'device') {
    push @{$hash{$name}},$col2;
  } else {
    # skip line
  }
}
close IN;
print Dumper \%hash;
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