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The given image is a ManyToMany field registered on the admin as filter_horizontal
for an Author model described below,
class Author(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=40)
class Book(models.Model):
title = models.CharField(max_length=255)
author = models.ManyToManyField(Author)
You can make the author like what shown in the image by registering it as
class BookAdmin(admin.ModelAdmin):
filter_horizontal = ('authors',)
admin.site.register(Book, BookAdmin)
filter_horizontal = ('authors',)
on the BookAdmin will create the author as shown below.
Source:stackexchange.com