I noticed when I upgraded to BIS 2.0 on Rogers (Canada) that I could no longer filter using multiple fields but only one field (ex. From or To or Subject or CC) and not multiple fields (ex. From with subject "health").
i'm not sure what your asking...yes w/ BIS 2.x you only have the option of filtering via one field - you just have to set up more filters; however you can now set up filters for each address you add so you have more control
i believe order of filters is important as well - like GMail - it will follow the first rule first and then the 2nd etc so it's possible to filter out what you had previously - i have not tested this personally though as i only have 2 filters (on to forward email that was sent to me and the other if it was cc'd to me - then my main is set to not filter; this way i don't get spam)