lol that's not quite what I'm saying, but yes if you go into stupid RAW that is exactly what it says.
Take Unbeliever mention of Brutal Surge.Effect: Once per day, upon a successful melee attack, the brutal surge weapon can initiate a bull rush attempt in addition to dealing its normal damage.
And my mention of BlurstrikeThe first attack made with a blurstrike weapon each round is made as if the target were flat-footed.
And let's grab one more since I mentioned the figurines.Ebony Fly: When animated, an ebony fly is the size of a pony and has all the statistics of a hippogriff but can make no attacks. The item can be used three times per week for up to 12 hours per use.
Both of these refer to the enhanced weapon (or this item).
Conductive went for "This weapon special ability can only be used once per round." - Again, not really intimate with Pathfinder here - which better matches Class Features, Feats and Spells.
At 9th level, if your animal companion hits an aberration that you also hit with a melee attack in the same round, the animal companion's attack deals an extra 2d6 points of damage. This ability functions only once per round (so multiple hits by the animal companion don't deal the extra damage more than once).
Rancor (Su): The foe hunter can deliver a powerful blow to her hated enemy. Once per round, on her action, she can designate one of her attacks against a hated enemy as a rancor attack before the attack roll is made.
Both of these can be RAWtarded to say only a single person can use them at once.
If you draw a light weapon and make a melee attack with it in the same round, you catch your opponent flat-footed (for the purpose of this attack only). You may use this feat only once per round and once per opponent during any single combat encounter.
Whilst this is a typical passive style, *you* may use it once per round. This type of wording is the de facto standard and can be found in all types of Feats such as Stunning Fist or Deflect Arrows.
The subject can switch "down" as often as it likes during the spell's duration, though only once per round, as a free action. Unattended objects fall, as normal.
As you can see, there are a few Spells like this as well (telekinesis and shapechange for instance). Maybe you *could* argue and say you could command two such instances of the Spell, however stacking rules would directly prohibit both instances from affecting you at once. For instance, a second False Gravity cast into the area would only hold true if it's duration were longer than the first.
So Spells are a no go, Feats/PrCs stick to person-using-it, Items refer to them selves, and you have two oddball PrCs that follow the same lol wording but contain enough context for you to be able to understand them properly.
Now turn to Conductive. Yeah it has some RAWtarded rules, but it's clearly not labeled like a typical Magic item is. It's wording is closer to that of other Special Abilities such as Class Features, Feats, Skill Tricks, and Spells through it lacks the possessive indication. But again, I am not speaking from a Pathfinder view. Literal and D&D examples is what I'm going by, both would play a back role if you could find something that proved Pathfinder's intent.