Is it permissible for me to take a portion of the money we earn from our online work to meet my material needs, especially since I do not receive my full due in return and am not paid a bonus like my colleagues?

It is not permissible to take hidden sums of money from beneficiaries of your work for which you receive a salary, because that is a form of betrayal and consuming people's wealth unlawfully. Financial need or insufficient salary does not justify this action. You can engage in additional work, provided you adhere to the specified working hours.