Add @Formula as option for Server Mail Rules - And allow a Comment in the Rule (displayed in the view)

Usecase:

My current need is to find out if a Mail comming from a specific database ... - e.g mail/jobs.nsf, expected user CN=jobs/O=MyCompany/c=DE - ...

was created by another id then the one of the 'jobs' Notes User (owner of this Mailfile).

Formular in this case might be something like

Principal = "CN=jobs/O=MyCompany/c=DE" & From != Principal.

The second part of my wish, a commend Field in the rule displayed in the list of Rules would allow to tell the Admin in plain text what is happening / who is in charge of this Rule / what priority should be applying.

For my current need the Action coud be done in @Formula, too ...

FIELD From = Principal

... (but I could more than understand if Support folks would get nervous if there was such an option as @Formuals can get complex).

Currently I can't even find a way to use the Conditions in rules to catch Mails send from this one database at all with Server Mailrules without programming something wired in the sending mailfile (as I can't select principal form the List of options).

Will most likely end up running code on each and every Mail - Customer is still small enough that I can consider this.