Your tapas link is:
So, if I understand correcly, by "ID name" you mean the name in the address bar (i.e. "silverraven" or "silverraven0" in your case)? Then, Google just finds the link on your profile with this name inside HTML code of the webpage. This way it works with all comments, made from your profile, independently of your "visible name" changes. While Tapas search probably doesn't search through HTML, but does it in some other way (?) (it's my assumption). If I'm right, then to solve your problem, Tapas should change their search algorithm, which is probably not simple.
Anyway, for now you can put something like
site:https://tapas.io silverraven
or, more precisely,
site:https://tapas.io silverraven <some comment text or whatever>
into Google Search to find what do you need (if only you haven't done it already?)