Reddit is an example of a Group system where posts are associated with a group. This is the model Lemmy uses.
Twitter is an example of a Person system where posts are associated with a person. This is the model Mastodon uses.
Some services can do both; like Kbin with their microblogs and magazines.
Sounds like the Wordpress implementation uses the Person system that Lemmy does not support at the moment, but probably works on Mastodon and Kbin (idk for sure).
Whenever my friends or I point to the sky after sitting in a chair in a McDonald’s on the second Saturday of the month while wearing a purple shirt. We just start cracking up until the manager comes out and tells us to leave.