Nope! What you want are these:

$hash{$key} = [ 1,2,3 ];        # Note the square brackets
$hash{$otherkey} = [ @temp ];   # same same
$hash{$key2} = \@temp;
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The first two create a reference to an anonymous array that has a copy of the contents. The last one creates a reference to an existing array.

And to access them, it's just ...

$hash{$key}[0]
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See perlreftut, perldsc, perlref, and perllol for more information