There isn't any filtering of serial ports (it lists everything it finds).

However it does support bookmarks. With bookmarks you open the serial port you want to use then select to bookmark it. WhippyTerm will take the current config you are using and save it for later. You can then just pick the bookmark later to reopen that connection. Bookmarks also store some of the settings (like is it a binary or text connection, terminal size, colors, etc).

It's a lot like bookmarks in a web browser.