1 | initial version |
Open the Conversations dialog (Statistics -> Conversations) select the IPv4 tab and then check the "Name resolution" box.
Hopefully you will see the hosts you want to filter out in either the "Address A" or "Address B" columns, right click conversations you want to filter out and select "Apply as Filter" -> "...and not Selected" -> "A -> Any" or "B -> Any" depending on whether the name is in the A or B column. Keep repeating as desired.
As I noted in the question comments a particular web site may use multiple different domains for all the components of the web page and they may not all be obviously linked so you will have to use "intuition" somewhat.
When you're happy with the result you can export your subset of the packets to a smaller file, with File -> "Export Specified Packets" and ensure the "Displayed" option is selected.