Answer
Yes — use REGEXP_LIKE in the data source's condition instead of a plain equality or LIKE comparison, converting the parameter's delimiter characters into regex syntax: for example, matching a field against the parameter value with its commas replaced by '|' (regex OR) and its wildcard replaced by '^' (regex start-anchor). With a comma as the delimiter, users enter multiple values like SITE1,SITE2,SITE3 (with no space after each comma) into the single parameter, and the REGEXP_LIKE condition matches any of them. This is a working alternative to splitting a comma-separated parameter value with REGEXP_SUBSTR for the same kind of multi-value Lobby parameter requirement.