Thomas Wyatt's poem, the full title of which is "Whoso List to Hunt, I Know where is an Hind," can be difficult to interpret after a quick read. This poem is one of the earliest sonnets, and even in more modern English can be tricky. Here's is one way to interpret and analyze this poem.
The poem was written in the early 1500s. A quick summary would say that Wyatt is addressing those who like to hunt and telling them he knows where to find a hind (female deer), but saying also that he has given up in the chase. Though he continues to follow the deer he has given up hope of catching her—in fact, he believes that she belongs to Ceaser, meaning she is off limits in some way.
It's likely that the poem can be interpreted to be about a woman. The deer could be about a woman, who seems tame and beautiful but is in fact wild and unattainable. The poet is mourning his loss and failure at the "hunt," the pursuit of this beautiful woman, and while he is telling other men that he knows this beautiful woman, he is also warning them of the futility of their chase.