I've added custom fields to our MantisBT installation (1.3.1). Is it possible to include them in the table when specifying the show parameter on a wiki page?
Topic on Extension talk:Mantis
There was a request a while back to allow searches on custom fields. see https://github.com/tessus/mwExtensionMantis/issues/8
I've never worked with custom fields thus I do not know how they work and how I could make them available (but I think I have an idea).
For now the answer to your question is no, but you can open a ticket on github. I'm travelling these days and don't have time to look into it.
Ticket on github: Custom fields