Please, give us a bigger picture. If the "ad hoc conditionals" will only come from the programmer (i.e. the code), there's no need for a structure, just use an anonymous subroutine:

my $allowed = sub { grep $_[0] == $_, 10022, 96813, 55401 };
if ($allowed->($redis_handle->get('key')) {
    # do something
}
[download]

But, if users will be creating those conditionals, you need a language + parser (or a GUI to build the conditionals graphically).