Add a tag to IP addresses in alerts

Hi all,

Considering I have a list of IP addresses in variables (e.g. HTTP_SERVERS: “[]”, SMTP_SERVERS: “[]”) and a ruleset with a rule e.g.
alert ip any any -> any any (msg: "test"; sid: 1;)

Is it possible to include a tag or some kind of information that would tell which variable(s) fit the IP addresses?

So that an alert would contain information something like: (SMTP_SERVERS) -> (unknown) "test"