Let me try this -
If I understand correctly what you have is -
Rules and conditions, Filter can have combination of multiple rules and conditions.
I would suggest to have two tables with one-to-many relationship. Parent stores the rule id and for each rule you have one or more records in child table.
rule1 - url contains blah1
rule2 - hits greater than 500
rule3 - url contains blah2 and hits greater than 1000
Now if user selects two rules, rule1 and rule 3 then building of the query from the returned LIST should have below logic
for different rule id keep on adding OR i.e. (url contains blah2 AND hits greater than 1000) OR url contains blah1
I may be completely wrong to understand your scenario...
