Yes, you can link a bank account in which you’re a joint holder. The procedure is the same as linking a normal single holder bank account.
Note : If you are adding money to your Zerodha account from a joint bank account that is linked with multiple Zerodha trading accounts using IMPS, NEFT or RTGS, send a soft copy of the bank statement that shows a debit towards Zerodha account by creating a ticket and mention the Kite user ID to which the funds need to be credited. When funds are transferred from a joint bank account that is linked to multiple trading accounts, Zerodha’s system will fetch multiple trading IDs and the credit has to be manually mapped. To avoid these issues, please transfer funds using payment gateway or UPI. This doesn't apply if you’ve added money using the payment gateway on Kite.