Items, Tags & Mods
Gating single items, whole item tags, every item from a mod, and carving exceptions back out of a mod lock.
NBT & Data Components
Gating only the stacks that match a criterion — an enchanted book with Sharpness, a potion with one effect, a modded item in one state.
Unlock Actions
Narrowing a lock to single interactions, so a locked item can still be carried, crafted or traded while the rest stays gated.
Recipes
Gating named recipe ids, what happens in JEI and EMI, and why an individual stage cannot reach a furnace.
Fluids
Gating a fluid rather than a bucket, so one entry covers every tank and container item in the pack — and every recipe that touches it.
Loot
Keeping locked items out of chest loot and mob drops, per player, and replacing them with something else.