I'm not exactly sure what you're asking, but the answer is likely no: You can't make tags just available to a given collection. You can also not have a tag only apply to an item in one collection and not in another collection: tags are set on an item, so if an item is in multiple collections, it has the same tags wherever it is.
Tags are specific to groups, though, so depending on what you're after, that might work for you.
Upgrade Storage
You can't make tags just available to a given collection.
You can also not have a tag only apply to an item in one collection and not in another collection: tags are set on an item, so if an item is in multiple collections, it has the same tags wherever it is.
Tags are specific to groups, though, so depending on what you're after, that might work for you.