Custom Layout post terms, only show primary category

I have a custom layout for my posts module that I would like to only show the primary category on. I have this code (below) working but it seems to only grab the first category alphabetically.

[wpbb post:terms_list taxonomy=‘category’ html_list=‘ul’ separator=', ’ linked=‘yes’ limit=‘1’]

Does anybody have a suggestion? Thank you!

Hi, Loops & Logic can do that: