In Aloaha there are several Timestamping Authorities pre-configured. The reason is that we make sure that the listed Authorities are RFC compliant before we add them to the pre-configured list.
Nevertheless it is possible for the user to add his own Authority. All what needs to be done is to edit tsa.ini and TSA.txt with the additional Authority. After that the user needs to open the Aloaha TSA settings and type blind the word aloaha into the TSA dropdown list.