Reading tidbits, it seems Rav Chaim is saying it is only permissible to use the internet with a filter. Without a filter it is assur to use the internet. Rav Wosner seems to be going a little further and saying it is assur to use the internet for personal use at all (i.e. having internet at home), even with a filter. But for business use, it is permissible with a filter. Both say that to use the internet at all, even with a filter, one must first ask their Rov a shaila about their personal need for the internet, and obtain a heter, if permissible, for them to use the internet (with a filter).
AZ, is that a good understanding of the psak din of the gedolei haposkim?