tasklist /m /fi "IMAGENAME eq wmiprvse.exe"
/M [module] Lists all tasks currently using the given
exe/dll name. If the module name is not
specified all loaded modules are displayed.
/FI filter Displays a set of tasks that match a
given criteria specified by the filter.
If you want DLL's hosted by any/all processes, remove the /FI filter parameter. In the example, we list dll's in use by the WMIPRVSE services.
Another example might be;
tasklist /m /fi "IMAGENAME eq cmd.exe"
You can filter on many different items, such as PID. Below we list dll's used by the SYSTEM process.
tasklist /m /fi "pid eq 4"