I requested the same feature about a year ago. I need to ignore about 90% of the tables in the database prior
to the compare. I've used this product in the past and I swear by it but with the database I'm working with now SQL Compare is impossible to use because of the number of tables in the DB that don't actually need to be compared. I would love to use this product again but it won't happen until there is a way to filter objects before
running the compare.
I noticed SQL Source Control now offers this feature, please add it to SQL Compare!