Unless the unmanaged resources tracker is enabled, the real-time view only includes memory used managed instances. The native memory view and the Task manager includes all memory used by the application, both managed and native memory. If you enable the unmanaged resources tracker, you will also get information about tracked native memory like Virtual alloced memory and Win32 Heap memor (but the total memory usage will be presented as separate managed and native memory numbers).
You can read more about the native memory view and the different types of memory in the online documentation at
http://memprofiler.com/OnlineDocs/memoryview.htm. You can read more about the unmanaged resources tracker at
http://memprofiler.com/OnlineDocs/unmanagedresourcestracker.htm.