Closes #5848: Filter custom fields by content type in format <app_label>.<model>

Author: jeremystretch

docs/release-notes/version-2.11.md

@@ -4,6 +4,7 @@
 
 ### Enhancements (from Beta)
 
+* [#5848](https://github.com/netbox-community/netbox/issues/5848) - Filter custom fields by content type in format `<app_label>.<model>`
 * [#6088](https://github.com/netbox-community/netbox/issues/6088) - Improved table configuration form
 * [#6097](https://github.com/netbox-community/netbox/issues/6097) - Redirect old slug-based object views
 * [#6109](https://github.com/netbox-community/netbox/issues/6109) - Add device counts to locations table

netbox/extras/filters.py

@@ -90,6 +90,7 @@ def __init__(self, *args, **kwargs):
 
 
 class CustomFieldFilterSet(django_filters.FilterSet):
+    content_types = ContentTypeFilter()
 
     class Meta:
         model = CustomField