Flaks can hit multiples, but that's because their sides have firing points as well (most other frigates except the Illuminator is front-only). But they still only have 1 target per side.
The Kol's autocannons can hit up to 4 targets, since it has firing points on all 4 sides. Its beams can hit 1 and I think its lasers are front-only also, so 1.