Input filter for each input type?

Situation.
Administrator's main task is to add and edit pages. He uses TinyMCE module for this task. So he should have ability to use rich formatting, so we have to force him to use Filtered HTML filter without Automatic line breaks feature.

User's can input information in only one way - they comment on nodes. So we have to force them to use Filtered HTML filter with Automatic line breaks feature.

Question. Can I enable only one input filter for each input type? It's difficult and unneccesary to explain people words like "HTML" and "filter" if all they want is to "simple edit page".

Thank you for answers :)