Hi Laurent,
Yes we do. You can use the EasyBlog - Latest Blogs Module to shows the most recent posts according to a specific tag.
To configure the specific tag, first under Module>Module Type, select Latest posts by tag.
Then, under Recent Tag Post>Tag Id's fill in the tag id number which you can find from EasyBlog's backend tags page. There are also other settings you can configure for the module. Try it out and let us know how it goes.