There are several ways to exclude an author from Radarly.
If you want to exclude the posts from your social accounts, simply check the "other" box in the filter bar (in the case where social accounts "Owned" are connected in Radarly).
To go further and improve the quality of your analysis, you can choose to exclude a list of authors. You can find more information on this page:
Finally, to block a specific source (a website, a Twitter account, a Facebook page, etc.) and thus delete all its contents (for the past and future), just click on the post in Radarly to open the description of the source concerned and click on the three small dots on the right before clicking on 'block this influencer'.
Note: blocking an author in the listening part of Radarly will also impact the Social Performance section of the tool.