Hi Cecelia - Unfortunately the system does not filter the results in the hovercard pop up by the category that the link may be referencing. It may be good to reference this over in the Jive Interactive Intranet space as an idea for a future version - Please be sure to include any background around your specific user case, as I suspect other community members would also be interested in seeing this implemented.
On a related note, there is a bug open currently under ID JIVE-30637, where the list of content shown in the hover card is not presented in an ordered format. This was fixed in 6.0.5 and 7.0.3 so that the list of content is sorted by latest activity date.
Hi David - I've added it as an idea, but looks like I've been locked out of adding new ones as I'm getting a restricted message.