According to the API http://www.solarwinds.com/documentation/webhelpdesk/docs/whd_api_12.1.0/web%20help%20desk%20api.html#tickets-listnotes , listing notes via the API does not return information like the person that submitted the note (either tech or client note) nor the date/time the note was entered or edited. I'd like to use the API to generate a charge back report and would use the fields for sorting the data by technician and by time (such as all notes by tech "john doe" in the past month).
Looking at the tech_note and client_note tables in the database, they contain fields for the tech id and the client id as well as date fields that can be used to expose this data. I have a feeling that the web page uses those fields already in pulling out the note information so it shouldn't be too hard to expose that information to the API as well.