Actually, it's a bit more complicated than that.
There are THREE parts to barreirs:
Active ability (only for manual barriers, the release of the barrier)
Passive ability (the ability of yamato, jirobo, hashirama barrier, also some passive barrier ones like Mei)
Buff

The OPs question is really related to the first 2. Fact of the matter is, for active ability of a barrier, only the caster of the barrier can utilize it. Whereas passive is shared across the team. This is regardless of whether or not the buff part is cross team.

For example, Jirobo vs Yamato. yes, I know the description both says "your lineup" but as it happens, jirobo boosts cross team whereas yamato only boost your own team, as far as buff goes. However, for both of them, the PASSIVE part of the barrier (the extra attack) will trigger for ALL jirobo/yamato on your side of field.

So Active: only caster. Passive: everyone on your field. Buff: depends on the barrier(ninja). And NONE of them are dependent on each other.

P.S. I don't think there is ANY barrier that have both a passive and active portion of effect. Perhaps only Haku, I'm not sure if the dodge bonus is granted to all haku or only the casting haku. But dodge is unreliable to begin with so it's hard to test (and yes, I tested everything I said above)

There is attack increase animation(with the little arrows) when Jirobo's barrier goes up in the OTHER teams.

That said, there does not appear to be a noticeable damage increase. (granted, I have been focusing on the damage dealt by the "other" team in my tests. I do actually need to check whether the boost is working for his own team, for a control. It is possible that his barrier boost is not working right)

So frankly, I am quite confused as to wtf is going on there.
Like I said, i test what I say, so I can't be "mistaken".

On a separate note, someone said that while the barrier appears to * after using kirin, the atk/nin bonus is gone. I might this this later if I find time. But if that is the case, then it's possible that the "barrier staying up" is merely a visual bug, which could explain why it isn't getting fixed any time soon as it doesn't matter. Keep in mind that we had gold TI tool stats for 2 month before they claimed it was a bug and took it away. So just because something *s doesn't mean it isn't a "bug"