Of course, there is. You've been making this category error for several years. Due process does not always mean the level of process due in a criminal trial. Students can be entitled to due process without being entitled to a jury trial. Or to the protections against self-incrimination and the entitlement to confront their accusers. That is criminal due process, the highest level of process anyone is entitled to and it applies when the government wants to deprive you of your liberty (i.e., lock you up). It does not apply when the government may want to deprive you of a property right. For instance, the government can seize your assets by merely showing probable cause that they were used in conjunction with a criminal activity. You have due process. You get a hearing. But not the same protections as a criminal trial.
EDIT: The screed you just posted makes exactly this point. What of the due process protections identified in that article (that are not specifically identified with criminal matters) does the Dear Colleague letter eliminate?