A lot of people use Keyhole to track influencer campaigns. Here are step-by-step instructions on how to use Keyhole to track influencers.
Step 1) On your My Tracks page, click Advanced
This will take you to the Advanced tracker setup page, where you can specify more than just hashtags.
Step 2) On the New Tracking Campaign page, select "Specific users only"
In this case, you don't want to track all accounts using the hashtag, but just specific influencers. This option allows you to specify users for the tracker.
Step 3) Enter the influencers' account names to be tracked for each platform
For each platform, Twitter, Instagram and Facebook, enter user account names separated by commas. The number of accounts permitted depends on the plan you are on.
Also note that each platform's text box is only editable if the platform is selected in the question above.
Result: Only posts by specified influencers are captured
Only posts by specified influencers are captured in this Keyhole tracker. Similarly, the downloadable Excel file will also only include posts by these influencers.