Topic on Help talk:Signatures

Would it be able to have a parameter showing the last user modifying the page much like the information on "View history" on the actual page?

I would like to include it in my infobox like

{{Infobox

|LastModifiedBy = SignatureOfTheLastEditedVersion

}}

You can display the name of the last user that edited the page with {{REVISIONUSER}}, but not the signature of that user (in case the user has a custom one). See Help:Magic words#REVISIONUSER