Yes, you can filter by source in Clay. To add a filter to your table:
1. Select the filters button at the top of your table
2. Click + Add filter
3. Select the column you want to filter from the dropdown
4. Choose a comparison operator (equal to, greater than, etc.)
5. Enter the value you want to compare against
You can also filter within sources themselves when setting them up. For example, Find Companies allows you to filter by industries, company size, location, keywords, and more. Find People sources let you filter by company attributes, job titles, experience, location, and other criteria.