Looks OK to me as it is - it's pretty clear what's going on - but you could simplify it slightly like this:

my %act = ( 'view.x' => \&view , 'invite.x' => \&invite );

foreach ($query->param()) {
    $act{$_}->() if defined $act{$_};
}
#danger, will robinson: I don't think $query->param() exists in old ve
+rsions of cgi.pm
[download]

I'm not sure this is really any better than what you've got, though. Still, hth.

Andy.