How can i restrict/filter Enum(Enumeration) Values in search section.

Hi,

I want to restrict the Enumeration values into Search section of our application,

we are having five values into dropdown and we are having Enum for this, based on the requirement we fetched these values from enum.

But now as per requirement we have to restrict this Enum value for 2 value only, so can any one has any idea how can filter these values.

thanks