Workflow management systems reflect business structures in a separate organizational model and a process model because these models describe different aspects of business structures. The organizational model comprises members of an organization and organizational relationships (organizational structure) whereas the process model contains information about the tasks and their dependencies (process structure). Linking both of these models becomes more and more problematic because organizational models change much more nowadays than they have before and so lead to orphaned references in the process model. Moreover, organizational models should be unknown during process modeling, and equivalent process models should run with different organizational structures. For this, we introduce conceptual graphs for specifying organizational structures in the organizational model and for specifying potential task holders in the process model. We cover organizational knowledge and retrieve it at runtime exploiting the benefits of these knowledge representation technique. With this, it is possible to renounce name referencing and gain more degrees of freedom for the linking process