Please help me with wordpress modification

I did ask this question in wordpress forums but Moshu (wordpress forums moderator) told me it's not wise because I have to created a hundread files of sidebar to do what I wanted and no other ways. He told me he is not a coder and told me to ask in programming forums. here is my question.

I want to show specific sidebar item for each post. Different items for each post.

Example
Post 1 --> show sidebar item 1
Post 2 --> show sidebar item 2

Can I put specific to show by refer to post id? I want my reader to see different sidebar item specific for each post while they are reading each post.

Not mean all items on sidebar, just one item

Example : My sidebar has 4 items but I want to change just one in four to show differently for each post.

Please help

 

Well, you could either:

Tell the Sidebar to display a different piece of content based on category.

Tell the Sidebar to randomly display a different piece of content.

 

Can I do for specific post, not category? How to do that?

cheers

 

Tried looking for plugins yet?

 

Of course I did but couldn't found it. Even Wordpress forums mod suggested me to change my mind. Do you have some plugins to recommend me?