I think you're on the right track, although you might try passing those arguments into the constructor rather than setting them after object creation. Also, if you assign $_ to an actual variable, you ought to use the var rather than rely on the implicit arguments to chomp and split:

my @objects;
foreach my $line (@file) {
    chomp($line);
    my ($creg, $cname, $attribs) = split(',', $line);
    my $object = Blah->new($creg, $cname, $attribs);
    push(@objects, $object);
}
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Alternatively you might store the objects in a hash where the unique ID is the key.

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"The dead do not recognize context" -- Kai, Lexx