Yes, the internal forum rightly understood and not as a process to legitimise something which is sinful. In the case of the divorced and remarried it would be helping them to come to terms with their situation so they understood what hindered them from receiving the Sacraments and what they need to do to fully integrate themselves fully back into the Church.
To the second question, I am sure that there are priests who have permitted such couples to receive Communion but I have no idea on what grounds they may have done. Nor can I speculate upon the state of mind of someone who was permitted to receive Communion.