my $template = HTML::Template->new(filename => $file);

# loop füllen
my $loop = [{name => 'herbert', nachname => 'müller'},{name => 'lisbeth', nachname => 'müller'}];

# 'normale' variablen
my $test = 'dies';
my $ist    = 'ist';

# erstellen des Hashs
my %params_fuer_template = (MY_LOOP => $loop, 
  VAR_1 => $ist,
  VAR_2 => $test);

$template->param(\%params_fuer_template);