Stored Procedure input parameters with more than one value

Question

I need to do a stored project in the oracle where I have 5 input parameters and 1 output parameter which will be a cursor(recordset). The problem is that each input parameter can receive more than one value, i.e., a list of values. These received parameters will be used as a filter in my WHERE clause.

For example, one of the input parameters will be p_customerID and this parameter can receive "ID001, ID002, ID003..." and in the return cursor select I must filter these Ids:

WHERE CUSTOMER in p_customerID

My doubts:

• How do I receive a list of values in a single parameter (in my case the 5 input parameters can receive 1 or more values )

• how I can use this parameter in WHERE to filter past values as a parameter.

Obs: This precedent will be called by an external system and will receive the cursor(recordset/refcursor) as return.