In Tableau, you can create a dynamic parameter that supports multiple values by using a parameter control combined with a set action. Begin by creating a parameter and defining its allowable values using a calculated field or a data source. Then, add a parameter control to the view. To allow users to select multiple values, create a set based on the parameter field and set the 'Allow Multiple Values' option. Finally, create a set action on the parameter control to apply the selected values to relevant visualizations.

One way to create a dynamic parameter that allows users to select multiple values in Tableau is by using a set. First, create a calculation that defines the conditions for selecting the values. Then, create a set based on this calculation by right-clicking on the calculated field and selecting 'Create Set'. In the set options, choose the 'Multiple Values (checkbox)' radio button. Now, this set can be used as a parameter, allowing the users to select multiple values from a drop-down.

Another approach to creating a dynamic parameter with multiple values is by using a parameter control combined with a calculated field. Start by defining the parameter with a data type that allows multiple values, such as string or integer array. Next, create a calculated field that references the parameter and applies the necessary logic for selecting the desired values. Finally, add the parameter control to the view, allowing users to select multiple values.