upload limit for each category

[a1367h]

Hi.
I been searching for what i need. So i had to made this post.
I want to run a photography match, So I need a category for match. And I need to the users just able to upload 5 images in this category(not more). Not all of the category. Just the photography match category.
So i need your help more than before.
It could be great show an error msg box if the user want to upload more. or hide the upload button. Or both.

I'm so please if  anyone help me.


I'm sorry if  I'm not good enough in English.