Multiple capabilities can be added to a resource. This is an optional setup.
Capabilities can be setup on a task (under Task requirements). This can allow a validation when assigning the task to a resource from a plan board, whether the resource holds that capability to complete the task.
Steps
Go to Work order project planning > Resources > Resources.
In the list, find and select the desired resource.
Click Add.
In the Capability field, enter or select a value.
In the Expiration field, enter a date.
Click Save.