Restrict Sourcebooks by campaign?

I'm currently in four campaigns, three of which are with the same group of people (we're each DMing a different campaign). I am the one who enables content sharing in all the campaigns, but in the campaign I am DMing, I want to restrict sourcebooks for character choices (specifically, no Acquisitions Incorporated). I can block the sourcebook in my campaign, but since I'm sharing in other campaigns that allow it, its options on the character sheets still show up. 

On the individual character sheets, I can disable things like 3rd-party content, which works as expected. But I don't see a way to restrict official content by sourcebook in any way. AM I missing anything, or is this just a feature that doesn't exist?

Unfortunate, but that's what I was expecting. Maybe someday,

I saw that, but even then, I can't block sourcebooks in campaigns I'm not the DM for, even though I'm the one enabling shared content. So, even if I block it in one campaign, they can still access it since they're in other campaigns with me.