title: In Magento2 how to create custom less file for particular store?
body: <p>In Magento2, how to create custom.less file for a particular store ? 
  i created custom themes like theme1, theme2 and theme3 in magento2 
  and also i created custom.less file only in theme but when i hit the command to compile this less file but is generated in all themes folders 
  i am only create this custom.less file in theme</p>
  
  <p>these steps i follow to compile </p>
  
  <p>step 1  : i am created <strong>custom.less</strong> file
  step 2 : i am run these command to generate from custom.less to csutom.css
           - <strong>php bin/magento setup:static:content:deploy -f</strong>
           - <strong>php bin/magento cache:clean</strong>
  conculsion : but this custom.css file generated in all themes.</p>
  
  <p>i have created multistore websites. i have created custom.less file in first store theme but after executed all the commands  css file is generated in all stores.  </p>