Search form on a forum or category

[Kanustep]

Hello,

I have a category dedicated to jobs where my team post everyday companies that look for employers.
This category is one main feature in my board and I want to put a search on it since the number os jobs posted are huge, and using the normal search will mix with the rest of the board.

I know that users can look on advanced search, but it will be more easy if down the navbar template we could include a search form to seek for a job, only shown in that category or forum ID.

How I can do this?

Thank you all