Hi @caygri

Greetings from Freshworks community! 

We understand that you would like to limit the number of tickets raised by a particular contact/ client, however as of now we do not have any such option to restrict the number of tickets raised by a single user. However you can restrict the user completely from raising tickets, please note a deleted user cannot raise tickets in your helpdesk. To delete a contact, You can go to Contacts → Select the contact → Delete, post which the user will not be able to raise any tickets. 

I hope this helps. 

i leave freshdesk