Yes, you can do this. As you chain the outputlookups, put the most broad search first. As you summarize the different items you need, you can write to additional lookup files using append, or even bring in another file, do stats processing, and then write it back out.
<run your initial search, for the daily data>
|outputlookup dailyfile.csv
<add the fully daily info to the weekly file, or do whatever summation is necessary>
|outputlookup append=true weeklyfile.csv
<bring in existing monthly data, and summarize it. then write it back out>
|append
[|inputlookup monthlyfile.csv]
|stats <summarize whatever>
|outputlookup monthlyfile.csv
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