Simply contact us via the Support & Feedback link in the top-right menu of any page, and send us a note requesting what kind of exclusion you would like, such as a limit on how much you can deposit, or a limit on the number of cash games you can join, and we will put the restriction on your account.
If you would like to limit or prevent any minors in your household from playing cash games, please click on the Support & Feedback link in the top-right menu of any page, and send us a note requesting this, which contains his or her user ID or email address registered on beyondfinland. We will modify his/her account so that he/she is not eligible to play any cash contests. There is also a great deal of parental control software available, such as Net Nanny or Symantec Norton Family. There are many others, some which are free.