In the context of a web-based collaborative working environment, any interactive activity among the actors themselves or between the actor and the system in the collaborative workspace produces a set of Collaborative Traces (CT). A collaborative trace reflects the group's working experience from past actions. Indeed, systematical experience reuse in organizations can sustain the complex project completion and problem solving by exploiting collaborative traces. This paper proposes a method and fundamental principles to enhance the exploitation of collaborative traces. Grounded on our previous work that defined a collaborative trace and proposed a corresponding model, we define a model of complex filter and discuss its possible functionalities according to the real needs and constrained by technical restrictions. The filter is the primary way for facilitating collaborative trace reuse. Using a collaborative platform E-MEMORAe2.0, we apply our model and validate several complex filters in two practical situations.