The loss limit is a net loss limit.
Example: If you have set your limit to CHF 100 per day and have CHF 200 real money in your player account, you can continue to play until you have CHF 100 left in your account. Any winnings you make in the meantime are not included in the loss limit.
In the example above, your account balance may be several hundred francs in the meantime, but the limit only applies once you have played your money down to CHF 100.