@FlashPlayer
Yeah good question. I am also interested in this question. For example, can I use the BAS interface to manage anti-detection browser profiles through the DevTools protocol?
Each asynchronous function started, starts in separate thread.
So in that example you will have 2 threads since 2 asynchronous functions
will be started, each with its own (different) script.
Export your spreadsheet as csv file, than import it to BAS as a resource and set it to use each line 1 time (it is default setting I think). That way each thread would take new line from your csv file in run mode or as compiled bot.