2jobs and 2salaries under same employer who sponsored my H1B visa?

If my employer sponsored my H1B visa with LCA of 85k, can I work for two jobs under same employer who will be paying me two salaries(7k+7k) every month?

Do you mean working for two different clients/projects from same location and in same/similar job role as in your LCA? If yes then this should be ok. You may be paid more salary than mentioned in the LCA but can’t be less.
If the job role for the other client/project is significantly different then mentioned in your LCA then your LCA & H1B must be amended with additional duties for the 2nd client/project.