Hi @avi2412 ,
You can use hasNamedRight('admin') or $(loginId) in sysFilter condition.
Document to Refer: https://experienceleague.adobe.com/docs/campaign-classic/using/configuring-campaign-classic/editing-schemas/filtering-schemas.html?lang=en
To use operator group in sysFilter, create a new named rights (Example, Name: newNamedRight) in /Administration/Access Management/Named rights/
Then, go to the operator group which you want to add in sysFilter, operator group > content > add this newly created Named rights in it.
Now in schema, sysFilter's condition, give hasNamedRight('newNamedRight').
By this way, you can able to give sysFilter to operator group.