Hi,
I know, its possible to set (registered and logged in) users to edit the own comments.It would be a nice feature if I could limit the time of a small span after publication of the comment.

So, if I could set for the posts in blog A that all registered and logged in users could edit their own comments for 5 minutes after publication that would be really great. For blog B I could set this time per example to 10 minutes if I want. So this settings is dependent of the blog.

May be as part of the setting "Structure > blog name > Features > Comments".