Our Post Grid Combo plugin will help you create a post grid by author. By reading this article, you’ll get a clear idea about how to query posts by the author.
First, click on the Query Post Tab.
Now search for the author by using the Choose button. Here you will find four options; click your desired option.

For Author:
You can access the author dropdown menu by choosing the author. Next, type in the Author ID. According to the author’s id, your Post Grid will update.

For Author Name:
You can access the “Author Name” dropdown menu by choosing the author name. Next, type in the author’s name. According to the author’s name, your Post Grid will update.

For Author In:
Here, type the Author IDs separated by a comma. The post grid is then updated with the specified authors’ posts.

For Author Not in:
Here type the Author ID. Now The post grid hides all the posts of the specified author.
