Urgent...using string variable in cursor of procedure to filter data???

In the first part of the procedure I am looking for a restriction based on a passed in laborcode.
If a restriction existed based on the laborcode I want to pass this to the cursor so that I can prohibit the return if the wonum if a restriction is present based on the cursor.  I am basically wanting to use the v_userrestrictions as the filter.  In a particluar case the result of the first query could set v_userrestrictions = (wol4 IN (SELECT pc_cc FROM wdw_fbr WHERE gn = 'PLNRST')).

If I do this:
AND ('|| v_userrestrictions ||')'; --I get errors

If I do this:
AND (wol4 IN (SELECT pc_cc FROM wdw_fbr WHERE gn = 'PLNRST')) --filters

So basically I am tryning to pass the v_userrestrictions to the cursor

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PROCEDURE GetByWonumLaborcode (p_wonum IN VARCHAR2, p_laborcode IN VARCHAR2, p_recordset OUT refcur)
    IS
       v_userrestrictions              VARCHAR2(254);
    BEGIN
      --Get the userrestrictions so we can use them in the filter below.
         SELECT  NVL(u.restrictions, '1=1')
         INTO v_userrestrictions
         FROM userrestrictions u
        WHERE  u.app = 'WOTRACK' AND
        u.username = (SELECT usrname FROM usergroups m WHERE laborcode = p_laborcode);
       EXCEPTION
       WHEN NO_DATA_FOUND THEN
        v_userrestrictions := '1=1';

--this will have about 20 columns to return once resolve is found
            OPEN p_recordset FOR
                     'SELECT w.wonum                                                  
                           FROM workorder w
                      WHERE w.wonum = p_wonum
                          AND w.historyflag = ''N''
                        AND ('|| v_userrestrictions ||')';
                                    --AND (wol4 IN (SELECT pc_cc FROM wdw_fbr WHERE gn = 'PLNRST'))
                         
END GetByWonumLaborcode;

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